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Commit538b645

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adding Tuple2/3/4/5#fill to fill each tuple instance with a given value
1 parent00a4a37 commit538b645

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8 files changed

+68
-2
lines changed

8 files changed

+68
-2
lines changed

‎src/main/java/com/jnape/palatable/lambda/adt/hlist/Tuple2.java

Lines changed: 12 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -57,8 +57,8 @@ public _2 _2() {
5757
* Destructure and apply this tuple to a function accepting the same number of arguments as this tuple's
5858
* slots. This can be thought of as a kind of dual to uncurrying a function and applying a tuple to it.
5959
*
60-
* @param fn the function to apply
61-
* @param <R>the return type of the function
60+
* @param fnthe function to apply
61+
* @param <R> the return type of the function
6262
* @return the result of applying the destructured tuple to the function
6363
*/
6464
public <R>Rinto(BiFunction<?super_1, ?super_2, ?extendsR>fn) {
@@ -115,4 +115,14 @@ public static <K, V> Tuple2<K, V> fromEntry(Map.Entry<K, V> entry) {
115115
returnnewTuple2<>(entry.getKey(),singletonHList(entry.getValue()));
116116
}
117117

118+
/**
119+
* Given a value of type <code>A</code>, produced an instance of this tuple with each slot set to that value.
120+
*
121+
* @param a the value to fill the tuple with
122+
* @param <A> the value type
123+
* @return the filled tuple
124+
*/
125+
publicstatic <A>Tuple2<A,A>fill(Aa) {
126+
returntuple(a,a);
127+
}
118128
}

‎src/main/java/com/jnape/palatable/lambda/adt/hlist/Tuple3.java

Lines changed: 12 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -98,4 +98,16 @@ public <_2Prime, _3Prime> Tuple3<_1, _2Prime, _3Prime> biMap(Function<? super _2
9898
Function<?super_3, ?extends_3Prime>rFn) {
9999
returnnewTuple3<>(_1(),tail().biMap(lFn,rFn));
100100
}
101+
102+
/**
103+
* Given a value of type <code>A</code>, produced an instance of this tuple with each slot set to that value.
104+
*
105+
* @param a the value to fill the tuple with
106+
* @param <A> the value type
107+
* @return the filled tuple
108+
* @see Tuple2#fill
109+
*/
110+
publicstatic <A>Tuple3<A,A,A>fill(Aa) {
111+
returntuple(a,a,a);
112+
}
101113
}

‎src/main/java/com/jnape/palatable/lambda/adt/hlist/Tuple4.java

Lines changed: 12 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -110,4 +110,16 @@ public <_3Prime, _4Prime> Tuple4<_1, _2, _3Prime, _4Prime> biMap(Function<? supe
110110
Function<?super_4, ?extends_4Prime>rFn) {
111111
returnnewTuple4<>(_1(),tail().biMap(lFn,rFn));
112112
}
113+
114+
/**
115+
* Given a value of type <code>A</code>, produced an instance of this tuple with each slot set to that value.
116+
*
117+
* @param a the value to fill the tuple with
118+
* @param <A> the value type
119+
* @return the filled tuple
120+
* @see Tuple2#fill
121+
*/
122+
publicstatic <A>Tuple4<A,A,A,A>fill(Aa) {
123+
returntuple(a,a,a,a);
124+
}
113125
}

‎src/main/java/com/jnape/palatable/lambda/adt/hlist/Tuple5.java

Lines changed: 12 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -108,4 +108,16 @@ public <_4Prime, _5Prime> Tuple5<_1, _2, _3, _4Prime, _5Prime> biMap(Function<?
108108
Function<?super_5, ?extends_5Prime>rFn) {
109109
returnnewTuple5<>(_1(),tail().biMap(lFn,rFn));
110110
}
111+
112+
/**
113+
* Given a value of type <code>A</code>, produced an instance of this tuple with each slot set to that value.
114+
*
115+
* @param a the value to fill the tuple with
116+
* @param <A> the value type
117+
* @return the filled tuple
118+
* @see Tuple2#fill
119+
*/
120+
publicstatic <A>Tuple5<A,A,A,A,A>fill(Aa) {
121+
returntuple(a,a,a,a,a);
122+
}
111123
}

‎src/test/java/com/jnape/palatable/lambda/adt/hlist/Tuple2Test.java

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -61,6 +61,11 @@ public void into() {
6161
assertEquals("foo1",tuple.into((s,i) ->s +i));
6262
}
6363

64+
@Test
65+
publicvoidfill() {
66+
assertEquals(tuple("foo","foo"),Tuple2.fill("foo"));
67+
}
68+
6469
@Test
6570
publicvoidfunctorProperties() {
6671
assertEquals(newTuple2<>(1,newSingletonHList<>("2")),tuple2.fmap(Object::toString));

‎src/test/java/com/jnape/palatable/lambda/adt/hlist/Tuple3Test.java

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -60,6 +60,11 @@ public void into() {
6060
assertEquals("foo12.0",tuple.into((s,i,d) ->s +i +d));
6161
}
6262

63+
@Test
64+
publicvoidfill() {
65+
assertEquals(tuple("foo","foo","foo"),Tuple3.fill("foo"));
66+
}
67+
6368
@Test
6469
publicvoidfunctorProperties() {
6570
assertEquals(newTuple3<>(1,newTuple2<>("2",newSingletonHList<>("3"))),tuple3.fmap(Object::toString));

‎src/test/java/com/jnape/palatable/lambda/adt/hlist/Tuple4Test.java

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -63,6 +63,11 @@ public void into() {
6363
assertEquals("foo12.0false",tuple.into((s,i,d,b) ->s +i +d +b));
6464
}
6565

66+
@Test
67+
publicvoidfill() {
68+
assertEquals(tuple("foo","foo","foo","foo"),Tuple4.fill("foo"));
69+
}
70+
6671
@Test
6772
publicvoidfunctorProperties() {
6873
assertEquals(newTuple4<>(1,newTuple3<>("2",newTuple2<>('3',newSingletonHList<>(true)))),tuple4.fmap(x -> !x));

‎src/test/java/com/jnape/palatable/lambda/adt/hlist/Tuple5Test.java

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -61,6 +61,11 @@ public void randomAccess() {
6161
verifyNoMoreInteractions(spiedTail);
6262
}
6363

64+
@Test
65+
publicvoidfill() {
66+
assertEquals(tuple("foo","foo","foo","foo","foo"),Tuple5.fill("foo"));
67+
}
68+
6469
@Test
6570
publicvoidfunctorProperties() {
6671
assertEquals(newTuple5<>(1,newTuple4<>("2",newTuple3<>('3',newTuple2<>(false,newSingletonHList<>("5"))))),

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