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[String] Add the reverse() method#35091

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Merged
nicolas-grekas merged 1 commit intosymfony:masterfromfancyweb:string-reverse
Dec 26, 2019
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5 changes: 5 additions & 0 deletionssrc/Symfony/Component/String/AbstractString.php
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Original file line numberDiff line numberDiff line change
Expand Up@@ -467,6 +467,11 @@ abstract public function replace(string $from, string $to): self;
*/
abstract public function replaceMatches(string $fromRegexp, $to): self;

/**
* @return static
*/
abstract public function reverse(): self;

/**
* @return static
*/
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11 changes: 11 additions & 0 deletionssrc/Symfony/Component/String/AbstractUnicodeString.php
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Expand Up@@ -342,6 +342,17 @@ public function replaceMatches(string $fromRegexp, $to): parent
return $str;
}

/**
* {@inheritdoc}
*/
public function reverse(): parent
{
$str = clone $this;
$str->string = implode('', array_reverse(preg_split('/(\X)/u', $str->string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY)));

return $str;
}

public function snake(): parent
{
$str = $this->camel()->title();
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11 changes: 11 additions & 0 deletionssrc/Symfony/Component/String/ByteString.php
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Original file line numberDiff line numberDiff line change
Expand Up@@ -303,6 +303,17 @@ public function replaceMatches(string $fromRegexp, $to): parent
return $str;
}

/**
* {@inheritdoc}
*/
public function reverse(): parent
{
$str = clone $this;
$str->string = strrev($str->string);

return $str;
}

public function slice(int $start = 0, int $length = null): parent
{
$str = clone $this;
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5 changes: 5 additions & 0 deletionssrc/Symfony/Component/String/CHANGELOG.md
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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,11 @@
CHANGELOG
=========

5.1.0
-----

* Added the `AbstractString::reverse()` method.

5.0.0
-----

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19 changes: 19 additions & 0 deletionssrc/Symfony/Component/String/Tests/AbstractAsciiTestCase.php
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Expand Up@@ -1377,4 +1377,23 @@ public function testToString()

self::assertSame('foobar', $instance->toString());
}

/**
* @dataProvider provideReverse
*/
public function testReverse(string $expected, string $origin)
{
$instance = static::createFromString($origin)->reverse();

$this->assertEquals(static::createFromString($expected), $instance);
}

public static function provideReverse()
{
return [
['', ''],
['oof', 'foo'],
["\n!!!\tTAERG SI ynofmyS ", " Symfony IS GREAT\t!!!\n"],
];
}
}
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Expand Up@@ -568,4 +568,16 @@ public static function providePadStart(): array
]
);
}

public static function provideReverse()
{
return array_merge(
parent::provideReverse(),
[
['äuß⭐erst', 'tsre⭐ßuä'],
['漢字ーユニコードéèΣσς', 'ςσΣèéドーコニユー字漢'],
['नमस्ते', 'तेस्मन'],
]
);
}
}
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