Provides extension methods for strings.
Some of these methods treat strings as a plain collection ofChars without any regard for Unicode handling. Unless the user takes Unicode handling in to account or makes sure the strings don't require such handling, these methods may result in unpaired or invalidly paired surrogate code units.
Attributes
- Companion
- object
- Source
- StringOps.scala
- Graph
- Supertypes
Members list
Value members
Concrete methods
Return the current string concatenatedn times.
Alias forconcat
Alias forconcat
Alias forconcat
Alias forprependedAll
Alias forprependedAll
Alias forprepended
Alias forprepended
Alias forappended
Alias forappended
Alias forappendedAll
Alias forappendedAll
Returns true ifthis is less thanthat
Returns true ifthis is less than or equal tothat.
Returns true ifthis is greater thanthat.
Returns true ifthis is greater than or equal tothat.
Appends this string to a string builder.
Appends this string to a string builder using a separator string.
Appends this string to a string builder using start, end and separator strings.
Appends this string to a string builder using start, end and separator strings.
Attributes
- Source
- StringOps.scala
A copy of the string with an element appended
A copy of the string with an element appended
A copy of the string with all elements from a collection appended
A copy of the string with another string appended
Get the char at the specified index.
Returns this string with first character converted to upper case.
Returns this string with first character converted to upper case. If the first character of the string is capitalized, it is returned unchanged. This method does not convert characters outside the Basic Multilingual Plane (BMP).
Attributes
- Source
- StringOps.scala
Steps over characters in this string.
Steps over characters in this string. Values are packed inInt for efficiency and compatibility with Java 8 Streams which have an efficient specialization forInt.
Attributes
- Source
- StringOps.scala
Steps over code points in this string.
Builds a new String by applying a partial function to all chars of this String on which the function is defined.
Builds a new String by applying a partial function to all chars of this String on which the function is defined.
Value parameters
- pf
the partial function which filters and maps the String.
Attributes
- Returns
a new String resulting from applying the given partial function
pfto each char on which it is defined and collecting the results.- Source
- StringOps.scala
Builds a new collection by applying a partial function to all chars of this String on which the function is defined.
Builds a new collection by applying a partial function to all chars of this String on which the function is defined.
Type parameters
- B
the element type of the returned collection.
Value parameters
- pf
the partial function which filters and maps the String.
Attributes
- Returns
a new collection resulting from applying the given partial function
pfto each char on which it is defined and collecting the results.- Source
- StringOps.scala
Iterates over combinations of elements.
Iterates over combinations of elements.
Acombination of lengthn is a sequence ofn elements selected in order of their first index in this sequence.
For example,"xyx" has two combinations of length 2. Thex is selected first:"xx","xy". The sequence"yx" is not returned as a combination because it is subsumed by"xy".
If there is more than one way to generate the same combination, only one will be returned.
For example, the result"xy" arbitrarily selected one of thex elements.
As a further illustration,"xyxx" has three different ways to generate"xy" because there are three elementsx to choose from. Moreover, there are three unordered pairs"xx" but only one is returned.
It is not specified which of these equal combinations is returned. It is an implementation detail that should not be relied on. For example, the combination"xx" does not necessarily contain the firstx in this sequence. This behavior is observable if the elements compare equal but are not identical.
As a consequence,"xyx".combinations(3).next() is"xxy": the combination does not reflect the order of the original sequence, but the order in which elements were selected, by "first index"; the order of eachx element is also arbitrary.
Attributes
- Returns
An Iterator which traverses the n-element combinations of this string.
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Example
"abbbc".combinations(2).foreach(println)// ab// ac// bb// bc"bab".combinations(2).foreach(println)// bb// ba- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Returns a new collection containing the chars from this string followed by the elements from the right hand operand.
Returns a new collection containing the chars from this string followed by the elements from the right hand operand.
Value parameters
- suffix
the collection to append.
Attributes
- Returns
a new collection which contains all chars of this string followed by all elements of
suffix.- Source
- StringOps.scala
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Value parameters
- suffix
the collection to append.
Attributes
- Returns
a new string which contains all chars of this string followed by all chars of
suffix.- Source
- StringOps.scala
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Value parameters
- suffix
the string to append.
Attributes
- Returns
a new string which contains all chars of this string followed by all chars of
suffix.- Source
- StringOps.scala
Tests whether this string contains the given character.
Tests whether this string contains the given character.
Value parameters
- elem
the character to test.
Attributes
- Returns
trueif this string has an element that is equal (as determined by==) toelem,falseotherwise.- Source
- StringOps.scala
Copy chars of this string to an array.
Copy chars of this string to an array. Fills the given arrayxs starting at index 0. Copying will stop once either the entire string has been copied or the end of the array is reached
Value parameters
- xs
the array to fill.
Attributes
- Source
- StringOps.scala
Copy chars of this string to an array.
Copy chars of this string to an array. Fills the given arrayxs starting at indexstart. Copying will stop once either the entire string has been copied or the end of the array is reached
Value parameters
- start
the starting index.
- xs
the array to fill.
Attributes
- Source
- StringOps.scala
Copy chars of this string to an array.
Copy chars of this string to an array. Fills the given arrayxs starting at indexstart with at mostlen chars. Copying will stop once either the entire string has been copied, or the end of the array is reached orlen chars have been copied.
Value parameters
- len
the maximal number of elements to copy.
- start
the starting index.
- xs
the array to fill.
Attributes
- Source
- StringOps.scala
Counts the number of chars in this string which satisfy a predicate
Computes the multiset difference between this string and another sequence.
Computes the multiset difference between this string and another sequence.
Value parameters
- that
the sequence of chars to remove
Attributes
- Returns
a new string which contains all chars of this string except some of occurrences of elements that also appear in
that. If an element valuexappearsn times inthat, then the firstn occurrences ofxwill not form part of the result, but any following occurrences will.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Selects all distinct chars of this string ignoring the duplicates.
Selects all distinct chars of this string ignoring the duplicates.
Attributes
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Selects all distinct chars of this string ignoring the duplicates as determined by== after applying the transforming functionf.
Selects all distinct chars of this string ignoring the duplicates as determined by== after applying the transforming functionf.
Type parameters
- B
the type of the elements after being transformed by
f
Value parameters
- f
The transforming function whose result is used to determine the uniqueness of each element
Attributes
- Returns
a new string consisting of all the chars of this string without duplicates.
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
The rest of the string without itsn first chars.
The rest of the string without itsn first chars.
Attributes
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
The rest of the string without itsn last chars.
The rest of the string without itsn last chars.
Attributes
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Drops longest prefix of chars that satisfy a predicate.
Drops longest prefix of chars that satisfy a predicate.
Value parameters
- p
The predicate used to test elements.
Attributes
- Returns
the longest suffix of this string whose first element does not satisfy the predicate
p.- Source
- StringOps.scala
Tests whether a predicate holds for at least one char of this string.
Tests whether a predicate holds for at least one char of this string.
Attributes
- Source
- StringOps.scala
Selects all chars of this string which satisfy a predicate.
Selects all chars of this string which do not satisfy a predicate.
Finds the first char of the string satisfying a predicate, if any.
Finds the first char of the string satisfying a predicate, if any.
Value parameters
- p
the predicate used to test elements.
Attributes
- Returns
an option value containing the first element in the string that satisfies
p, orNoneif none exists.- Source
- StringOps.scala
Builds a new collection by applying a function to all chars of this string and using the elements of the resulting collections.
Builds a new collection by applying a function to all chars of this string and using the elements of the resulting collections.
Value parameters
- f
the function to apply to each char.
Attributes
- Returns
a new collection resulting from applying the given collection-valued function
fto each char of this string and concatenating the results.- Source
- StringOps.scala
Builds a new string by applying a function to all chars of this string and using the elements of the resulting strings.
Builds a new string by applying a function to all chars of this string and using the elements of the resulting strings.
Value parameters
- f
the function to apply to each char.
Attributes
- Returns
a new string resulting from applying the given string-valued function
fto each char of this string and concatenating the results.- Source
- StringOps.scala
Alias forfoldLeft.
Alias forfoldLeft.
The type parameter is more restrictive than forfoldLeft to be consistent withIterableOnceOps.fold.
Type parameters
- A1
The type parameter for the binary operator, a supertype of
Char.
Value parameters
- op
A binary operator.
- z
An initial value.
Attributes
- Returns
The result of applying
optozand all chars in this string, going left to right. Returnszif this string is empty.- Source
- StringOps.scala
Applies the given binary operatorop to the given initial valuez and all chars in this string, going left to right.
Applies the given binary operatorop to the given initial valuez and all chars in this string, going left to right. Returns the initial value if this string is empty.
Ifx1,x2, ...,xn are the chars in this string, the result isop( op( ... op( op(z, x1), x2) ... ), xn).
Type parameters
- B
The result type of the binary operator.
Value parameters
- op
A binary operator.
- z
An initial value.
Attributes
- Returns
The result of applying
optozand all chars in this string, going left to right. Returnszif this string is empty.- Source
- StringOps.scala
Applies the given binary operatorop to all chars in this string and the given initial valuez, going right to left.
Applies the given binary operatorop to all chars in this string and the given initial valuez, going right to left. Returns the initial value if this string is empty.
Ifx1,x2, ...,xn are the chars in this string, the result isop(x1, op(x2, op( ... op(xn, z) ... ))).
Type parameters
- B
The result type of the binary operator.
Value parameters
- op
A binary operator.
- z
An initial value.
Attributes
- Returns
The result of applying
opto all chars in this string andz, going right to left. Returnszif this string is empty.- Source
- StringOps.scala
Tests whether a predicate holds for all chars of this string.
Tests whether a predicate holds for all chars of this string.
Value parameters
- p
the predicate used to test elements.
Attributes
- Returns
trueif this string is empty or the given predicatepholds for all chars of this string, otherwisefalse.- Source
- StringOps.scala
Applyf to each element for its side effects.
Applyf to each element for its side effects. Note: [U] parameter needed to help scalac's type inference.
Attributes
- Source
- StringOps.scala
Uses the underlying string as a pattern (in a fashion similar to printf in C), and uses the supplied arguments to fill in the holes.
Uses the underlying string as a pattern (in a fashion similar to printf in C), and uses the supplied arguments to fill in the holes.
The interpretation of the formatting patterns is described injava.util.Formatter, with the addition that classes deriving fromScalaNumber (such asscala.BigInt andscala.BigDecimal) are unwrapped to pass a type whichFormatter understands.
Seescala.StringContext#f for a formatting interpolator that checks the format string at compilation.
Value parameters
- args
the arguments used to instantiating the pattern.
Attributes
- Throws
java.util.IllegalFormatException if the format contains syntax or conversion errors
- Source
- StringOps.scala
Likeformat(args*) but takes an initialLocale parameter which influences formatting as injava.lang.String's format.
Likeformat(args*) but takes an initialLocale parameter which influences formatting as injava.lang.String's format.
The interpretation of the formatting patterns is described injava.util.Formatter, with the addition that classes deriving fromScalaNumber (such asscala.BigInt andscala.BigDecimal) are unwrapped to pass a type whichFormatter understands.
Value parameters
- args
the arguments used to instantiating the pattern.
- l
an instance of
java.util.Locale
Attributes
- Throws
java.util.IllegalFormatException if the format contains syntax or conversion errors
- Source
- StringOps.scala
Partitions this string into a map of strings according to some discriminator function.
Partitions this string into a map of strings according to some discriminator function.
Type parameters
- K
the type of keys returned by the discriminator function.
Value parameters
- f
the discriminator function.
Attributes
- Returns
A map from keys to strings such that the following invariant holds:
(xs groupBy f)(k) = xs filter (x => f(x) == k)That is, every key
kis bound to a string of those elementsxfor whichf(x)equalsk.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Partitions elements in fixed size strings.
Partitions elements in fixed size strings.
Value parameters
- size
the number of elements per group
Attributes
- Returns
An iterator producing strings of size
size, except the last will be less than sizesizeif the elements don't divide evenly.- See also
scala.collection.Iterator, method
grouped- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Selects the first char of this string.
Selects the first char of this string.
Attributes
- Returns
the first char of this string.
- Throws
NoSuchElementExceptionif the string is empty.
- Source
- StringOps.scala
Optionally selects the first char.
Optionally selects the first char.
Attributes
- Returns
the first char of this string if it is nonempty,
Noneif it is empty.- Source
- StringOps.scala
Finds index of the first char satisfying some predicate after or at some start index.
Finds index of the first char satisfying some predicate after or at some start index.
Value parameters
- from
the start index
- p
the predicate used to test elements.
Attributes
- Returns
the index
>= fromof the first element of this string that satisfies the predicatep, or-1, if none exists.- Source
- StringOps.scala
Produces the range of all indices of this string.
Produces the range of all indices of this string.
Attributes
- Returns
a
Rangevalue from0to one less than the length of this string.- Source
- StringOps.scala
The initial part of the string without its last char.
The initial part of the string without its last char.
Attributes
- Throws
UnsupportedOperationExceptionif the string is empty.
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterates over the inits of this string.
Iterates over the inits of this string. The first value will be this string and the final one will be an empty string, with the intervening values the results of successive applications ofinit.
Attributes
- Returns
an iterator over all the inits of this string
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Computes the multiset intersection between this string and another sequence.
Computes the multiset intersection between this string and another sequence.
Value parameters
- that
the sequence of chars to intersect with.
Attributes
- Returns
a new string which contains all chars of this string which also appear in
that. If an element valuexappearsn times inthat, then the firstn occurrences ofxwill be retained in the result, but any following occurrences will be omitted.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterator can be used only once
Attributes
- Source
- StringOps.scala
Selects the last char of this string.
Selects the last char of this string.
Attributes
- Returns
the last char of this string.
- Throws
NoSuchElementExceptionif the string is empty.
- Source
- StringOps.scala
Finds index of the last char satisfying some predicate before or at some end index.
Finds index of the last char satisfying some predicate before or at some end index.
Value parameters
- end
the end index
- p
the predicate used to test elements.
Attributes
- Returns
the index
<= endof the last element of this string that satisfies the predicatep, or-1, if none exists.- Source
- StringOps.scala
Optionally selects the last char.
Optionally selects the last char.
Attributes
- Returns
the last char of this string if it is nonempty,
Noneif it is empty.- Source
- StringOps.scala
Analogous tozip except that the elements in each collection are not consumed until a strict operation is invoked on the returnedLazyZip2 decorator.
Analogous tozip except that the elements in each collection are not consumed until a strict operation is invoked on the returnedLazyZip2 decorator.
Calls tolazyZip can be chained to support higher arities (up to 4) without incurring the expense of constructing and deconstructing intermediary tuples.
val xs = List(1, 2, 3)val res = (xs lazyZip xs lazyZip xs lazyZip xs).map((a, b, c, d) => a + b + c + d)// res == List(4, 8, 12)Type parameters
- B
the type of the second element in each eventual pair
Value parameters
- that
the iterable providing the second element of each eventual pair
Attributes
- Returns
a decorator
LazyZip2that allows strict operations to be performed on the lazily evaluated pairs or chained calls tolazyZip. Implicit conversion toIterable[(A, B)]is also supported.- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Lines in this string, where a line is terminated by"\n","\r","\r\n", or the end of the string.
Lines in this string, where a line is terminated by"\n","\r","\r\n", or the end of the string. A line may be empty. Line terminators are removed.
Attributes
- Source
- StringOps.scala
Return an iterator of all lines embedded in this string, including trailing line separator characters.
Return an iterator of all lines embedded in this string, including trailing line separator characters.
The empty string yields an empty iterator.
Attributes
- Source
- StringOps.scala
Builds a new collection by applying a function to all chars of this string.
Builds a new collection by applying a function to all chars of this string.
Value parameters
- f
the function to apply to each char.
Attributes
- Returns
a new collection resulting from applying the given function
fto each char of this string and collecting the results.- Source
- StringOps.scala
Builds a new string by applying a function to all chars of this string.
Builds a new string by applying a function to all chars of this string.
Value parameters
- f
the function to apply to each char.
Attributes
- Returns
a new string resulting from applying the given function
fto each char of this string and collecting the results.- Source
- StringOps.scala
Displays all elements of this string in a string using start, end, and separator strings.
Displays all elements of this string in a string using start, end, and separator strings.
Value parameters
- end
the ending string.
- sep
the separator string.
- start
the starting string.
Attributes
- Returns
The resulting string begins with the string
startand ends with the stringend. Inside, the string chars of this string are separated by the stringsep.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Displays all elements of this string in a string using a separator string.
Displays all elements of this string in a string using a separator string.
Value parameters
- sep
the separator string.
Attributes
- Returns
In the resulting string the chars of this string are separated by the string
sep.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Returns this string
Tests whether the string is not empty.
Returns a collection with an element appended until a given target length is reached.
Returns a collection with an element appended until a given target length is reached.
Value parameters
- elem
the padding value
- len
the target length
Attributes
- Returns
a collection consisting of this string followed by the minimal number of occurrences of
elemso that the resulting collection has a length of at leastlen.- Source
- StringOps.scala
Returns a string with a char appended until a given target length is reached.
Returns a string with a char appended until a given target length is reached.
Value parameters
- elem
the padding value
- len
the target length
Attributes
- Returns
a string consisting of this string followed by the minimal number of occurrences of
elemso that the resulting string has a length of at leastlen.- Source
- StringOps.scala
A pair of, first, all chars that satisfy predicatep and, second, all chars that do not.
A pair of, first, all chars that satisfy predicatep and, second, all chars that do not.
Attributes
- Source
- StringOps.scala
Applies a functionf to each character of the string and returns a pair of strings: the first one made of those characters returned byf that were wrapped inscala.util.Left, and the second one made of those wrapped inscala.util.Right.
Applies a functionf to each character of the string and returns a pair of strings: the first one made of those characters returned byf that were wrapped inscala.util.Left, and the second one made of those wrapped inscala.util.Right.
Example:
val xs = "1one2two3three" partitionMap { c => if (c > 'a') Left(c) else Right(c)}// xs == ("onetwothree", "123")Value parameters
- f
the 'split function' mapping the elements of this string to anscala.util.Either
Attributes
- Returns
a pair of strings: the first one made of those characters returned by
fthat were wrapped inscala.util.Left, and the second one made of those wrapped inscala.util.Right.- Source
- StringOps.scala
Produces a new collection where a slice of characters in this string is replaced by another collection.
Produces a new collection where a slice of characters in this string is replaced by another collection.
Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original string appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.
Value parameters
- from
the index of the first replaced char
- other
the replacement collection
- replaced
the number of chars to drop in the original string
Attributes
- Returns
a new collection consisting of all chars of this string except that
replacedchars starting fromfromare replaced byother.- Source
- StringOps.scala
Produces a new collection where a slice of characters in this string is replaced by another collection.
Produces a new collection where a slice of characters in this string is replaced by another collection.
Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original string appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.
Value parameters
- from
the index of the first replaced char
- other
the replacement string
- replaced
the number of chars to drop in the original string
Attributes
- Returns
a new string consisting of all chars of this string except that
replacedchars starting fromfromare replaced byother.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Produces a new string where a slice of characters in this string is replaced by another string.
Produces a new string where a slice of characters in this string is replaced by another string.
Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original string appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.
Value parameters
- from
the index of the first replaced char
- other
the replacement string
- replaced
the number of chars to drop in the original string
Attributes
- Returns
a new string consisting of all chars of this string except that
replacedchars starting fromfromare replaced byother.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterates over distinct permutations of elements.
Iterates over distinct permutations of elements.
Attributes
- Returns
An Iterator which traverses the distinct permutations of this string.
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Example
"abb".permutations.foreach(println)// abb// bab// bba- Source
- StringOps.scala
A copy of the string with an element prepended
A copy of the string with an char prepended
A copy of the string with all elements from a collection prepended
A copy of the string with another string prepended
You can follow a string with.r, turning it into aRegex.
You can follow a string with.r, turning it into aRegex. E.g.
"""A\w*""".r is the regular expression for ASCII-only identifiers starting withA.
"""(?<month>\d\d)-(?<day>\d\d)-(?<year>\d\d\d\d)""".r matches dates and provides its subcomponents through groups named "month", "day" and "year".
Attributes
- Source
- StringOps.scala
Returns new sequence with elements in reversed order.
Returns new sequence with elements in reversed order.
Attributes
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
An iterator yielding chars in reversed order.
An iterator yielding chars in reversed order.
Note:xs.reverseIterator is the same asxs.reverse.iterator but implemented more efficiently.
Attributes
- Returns
an iterator yielding the chars of this string in reversed order
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Selects an interval of elements.
Selects an interval of elements. The returned string is made up of all elementsx which satisfy the invariant:
from <= indexOf(x) < untilValue parameters
- from
the lowest index to include from this string.
- until
the lowest index to EXCLUDE from this string.
Attributes
- Returns
a string containing the elements greater than or equal to index
fromextending up to (but not including) indexuntilof this string.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Groups chars in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
Groups chars in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
Value parameters
- size
the number of chars per group
- step
the distance between the first chars of successive groups
Attributes
- Returns
An iterator producing strings of size
size, except the last element (which may be the only element) will be truncated if there are fewer thansizechars remaining to be grouped.- See also
scala.collection.Iterator, method
sliding- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Sorts this string according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
Sorts this string according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
The sort is stable. That is, elements that are equal (as determined byord.compare) appear in the same order in the sorted sequence as in the original.
Type parameters
- B
the target type of the transformation
f, and the type where the orderingordis defined.
Value parameters
- f
the transformation function mapping elements to some other domain
B.- ord
the ordering assumed on domain
B.
Attributes
- Returns
a string consisting of the chars of this string sorted according to the ordering where
x < yiford.lt(f(x), f(y)).- See also
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Sorts this string according to a comparison function.
Sorts this string according to a comparison function.
The sort is stable. That is, elements that are equal (as determined bylt) appear in the same order in the sorted sequence as in the original.
Value parameters
- lt
the comparison function which tests whether its first argument precedes its second argument in the desired ordering.
Attributes
- Returns
a string consisting of the elements of this string sorted according to the comparison function
lt.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Sorts the characters of this string according to an Ordering.
Sorts the characters of this string according to an Ordering.
The sort is stable. That is, elements that are equal (as determined byord.compare) appear in the same order in the sorted sequence as in the original.
Value parameters
- ord
the ordering to be used to compare elements.
Attributes
- Returns
a string consisting of the chars of this string sorted according to the ordering
ord.- See also
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Splits this string into a prefix/suffix pair according to a predicate.
Splits this string into a prefix/suffix pair according to a predicate.
Note:c span p is equivalent to (but more efficient than)(c takeWhile p, c dropWhile p), provided the evaluation of the predicatep does not cause any side-effects.
Value parameters
- p
the test predicate
Attributes
- Returns
a pair consisting of the longest prefix of this string whose chars all satisfy
p, and the rest of this string.- Source
- StringOps.scala
Split this string around the separator character
Split this string around the separator character
If this string is the empty string, returns an array of strings that contains a single empty string.
If this string is not the empty string, returns an array containing the substrings terminated by the start of the string, the end of the string or the separator character, excluding empty trailing substrings
If the separator character is a surrogate character, only split on matching surrogate characters if they are not part of a surrogate pair
The behaviour follows, and is implemented in terms ofString.split(re: String)
Value parameters
- separator
the character used as a delimiter
Attributes
- Example
"a.b".split('.') //returns Array("a", "b")//splitting the empty string always returns the array with a single//empty string"".split('.') //returns Array("")//only trailing empty substrings are removed"a.".split('.') //returns Array("a")".a.".split('.') //returns Array("", "a")"..a..".split('.') //returns Array("", "", "a")//all parts are empty and trailing".".split('.') //returns Array()"..".split('.') //returns Array()//surrogate pairsval high = 0xD852.toCharval low = 0xDF62.toCharval highstring = high.toStringval lowstring = low.toString//well-formed surrogate pairs are not splitval highlow = highstring + lowstringhighlow.split(high) //returns Array(highlow)//bare surrogate characters are splitval bare = "_" + highstring + "_"bare.split(high) //returns Array("_", "_")- Source
- StringOps.scala
Splits this string into two at a given position.
Splits this string into two at a given position. Note:c splitAt n is equivalent to(c take n, c drop n).
Value parameters
- n
the position at which to split.
Attributes
- Returns
a pair of strings consisting of the first
nchars of this string, and the other chars.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Stepper can be used with Java 8 Streams.
Stepper can be used with Java 8 Streams. This method is equivalent to a call tocharStepper. See alsocodePointStepper.
Attributes
- Source
- StringOps.scala
Strip the trailing line separator from this string if there is one.
Strip the trailing line separator from this string if there is one. The line separator is taken as"\n","\r", or"\r\n".
Attributes
- Source
- StringOps.scala
For every line in this string:
For every line in this string:
Strip a leading prefix consisting of blanks or control characters followed bymarginChar from the line.
Attributes
- Source
- StringOps.scala
For every line in this string:
For every line in this string:
Strip a leading prefix consisting of blanks or control characters followed by| from the line.
Attributes
- Source
- StringOps.scala
Returns this string with the givenprefix stripped.
Returns this string with the givenprefix stripped. If this string does not start withprefix, it is returned unchanged.
Attributes
- Source
- StringOps.scala
Returns this string with the givensuffix stripped.
Returns this string with the givensuffix stripped. If this string does not end withsuffix, it is returned unchanged.
Attributes
- Source
- StringOps.scala
The rest of the string without its first char.
The rest of the string without its first char.
Attributes
- Throws
UnsupportedOperationExceptionif the string is empty.
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterates over the tails of this string.
Iterates over the tails of this string. The first value will be this string and the final one will be an empty string, with the intervening values the results of successive applications oftail.
Attributes
- Returns
an iterator over all the tails of this string
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
A string containing the firstn chars of this string.
A string containing the firstn chars of this string.
Attributes
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
A string containing the lastn chars of this string.
A string containing the lastn chars of this string.
Attributes
- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Takes longest prefix of chars that satisfy a predicate.
Attributes
- Source
- StringOps.scala
Attributes
- Throws
java.lang.IllegalArgumentExceptionIf the string does not contain a parsable
Boolean.- Source
- StringOps.scala
Try to parse as aBoolean
Try to parse as aBoolean
Attributes
- Returns
Some(true)if the string is "true" case insensitive,Some(false)if the string is "false" case insensitive, andNoneif the string is anything else- Throws
java.lang.NullPointerExceptionif the string is
null- Source
- StringOps.scala
Parse as aByte (string must contain only decimal digits and optional leading- or+).
Parse as aByte (string must contain only decimal digits and optional leading- or+).
Attributes
- Throws
java.lang.NumberFormatExceptionIf the string does not contain a parsable
Byte.- Source
- StringOps.scala
Try to parse as aByte
Try to parse as aByte
Attributes
- Returns
Some(value)if the string contains a valid byte value, otherwiseNone- Throws
java.lang.NullPointerExceptionif the string is
null- Source
- StringOps.scala
Parse as aDouble (surrounding whitespace is removed with atrim).
Parse as aDouble (surrounding whitespace is removed with atrim).
Attributes
- Throws
java.lang.NullPointerExceptionIf the string is null.
java.lang.NumberFormatExceptionIf the string does not contain a parsable
Double.- Source
- StringOps.scala
Try to parse as aDouble
Try to parse as aDouble
Attributes
- Returns
Some(value)if the string is a parsableDouble,Noneotherwise- Throws
java.lang.NullPointerException If the string is null
- Source
- StringOps.scala
Parse as aFloat (surrounding whitespace is removed with atrim).
Parse as aFloat (surrounding whitespace is removed with atrim).
Attributes
- Throws
java.lang.NullPointerExceptionIf the string is null.
java.lang.NumberFormatExceptionIf the string does not contain a parsable
Float.- Source
- StringOps.scala
Try to parse as aFloat
Try to parse as aFloat
Attributes
- Returns
Some(value)if the string is a parsableFloat,Noneotherwise- Throws
java.lang.NullPointerException If the string is null
- Source
- StringOps.scala
Parse as anInt (string must contain only decimal digits and optional leading- or+).
Parse as anInt (string must contain only decimal digits and optional leading- or+).
Attributes
- Throws
java.lang.NumberFormatExceptionIf the string does not contain a parsable
Int.- Source
- StringOps.scala
Try to parse as anInt
Try to parse as anInt
Attributes
- Returns
Some(value)if the string contains a valid Int value, otherwiseNone- Throws
java.lang.NullPointerExceptionif the string is
null- Source
- StringOps.scala
Parse as aLong (string must contain only decimal digits and optional leading- or+).
Parse as aLong (string must contain only decimal digits and optional leading- or+).
Attributes
- Throws
java.lang.NumberFormatExceptionIf the string does not contain a parsable
Long.- Source
- StringOps.scala
Try to parse as aLong
Try to parse as aLong
Attributes
- Returns
Some(value)if the string contains a valid long value, otherwiseNone- Throws
java.lang.NullPointerExceptionif the string is
null- Source
- StringOps.scala
Parse as aShort (string must contain only decimal digits and optional leading- or+).
Parse as aShort (string must contain only decimal digits and optional leading- or+).
Attributes
- Throws
java.lang.NumberFormatExceptionIf the string does not contain a parsable
Short.- Source
- StringOps.scala
Try to parse as aShort
Try to parse as aShort
Attributes
- Returns
Some(value)if the string contains a valid short value, otherwiseNone- Throws
java.lang.NullPointerExceptionif the string is
null- Source
- StringOps.scala
A copy of this string with one single replaced element.
A copy of this string with one single replaced element.
Value parameters
- elem
the replacing element
- index
the position of the replacement
Attributes
- Returns
a new string which is a copy of this string with the element at position
indexreplaced byelem.- Throws
IndexOutOfBoundsExceptionif
indexdoes not satisfy0 <= index < length.- Note
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Creates a non-strict filter of this string.
Creates a non-strict filter of this string.
Value parameters
- p
the predicate used to test elements.
Attributes
- Returns
an object of class
stringOps.WithFilter, which supportsmap,flatMap,foreach, andwithFilteroperations. All these operations apply to those chars of this string which satisfy the predicatep.- Note
the difference between
c filter pandc withFilter pis that the former creates a new string, whereas the latter only restricts the domain of subsequentmap,flatMap,foreach, andwithFilteroperations.- Source
- StringOps.scala
Deprecated methods
Return all lines in this string in an iterator, excluding trailing line end characters; i.e., apply.stripLineEnd to all lines returned bylinesWithSeparators.
Return all lines in this string in an iterator, excluding trailing line end characters; i.e., apply.stripLineEnd to all lines returned bylinesWithSeparators.
Attributes
- Deprecated
[Since version 2.13.0]Use `linesIterator`, because JDK 11 adds a `lines` method on String- Source
- StringOps.scala
You can follow a string with.r(g1, ... , gn), turning it into aRegex, with group names g1 through gn.
You can follow a string with.r(g1, ... , gn), turning it into aRegex, with group names g1 through gn.
"""(\d\d)-(\d\d)-(\d\d\d\d)""".r("month", "day", "year") matches dates and provides its subcomponents through groups named "month", "day" and "year".
Value parameters
- groupNames
The names of the groups in the pattern, in the order they appear.
Attributes
- Deprecated
[Since version 2.13.7]use inline group names like (?<year>X) instead- Source
- StringOps.scala
Replace all literal occurrences ofliteral with the literal stringreplacement.
Replace all literal occurrences ofliteral with the literal stringreplacement. This method is equivalent tojava.lang.String#replace.
Value parameters
- literal
the string which should be replaced everywhere it occurs
- replacement
the replacement string
Attributes
- Returns
the resulting string
- Deprecated
[Since version 2.13.2]Use `s.replace` as an exact replacement- Source
- StringOps.scala