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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| <?php | ||
|
|
||
| namespace Dash; | ||
|
|
||
| /** | ||
| * Gets a list of nested elements in `$iterable`. | ||
| * | ||
| * Keys in `$iterable` are not preserved. | ||
| * | ||
| * @see groupBy() | ||
| * | ||
| * @param iterable|stdClass|null $iterable | ||
| * @return array List of elements in `$iterable`, including elements of directly nested iterables. | ||
| * | ||
| * @example | ||
| Dash\flatten([[1, 2], [3, 4]]); | ||
| // === [1, 2, 3, 4] | ||
| Dash\flatten([['a' => 1, 'b' => 2], ['c' => 3]]); | ||
| // === [1, 2, 3] | ||
| * | ||
| * @example With a mix of nested and non-nested iterables | ||
| Dash\flatten([1, 2, [3, 4]]); | ||
| // === [1, 2, 3, 4] | ||
| * | ||
| * @example Deeply nested array | ||
| Dash\flatten([ | ||
| [1, 2], | ||
| [[3, 4]] | ||
| ]); | ||
| // === [1, 2, [3, 4]] | ||
| */ | ||
| function flatten($iterable) | ||
| { | ||
| assertType($iterable, ['iterable', 'stdClass', 'null'], __FUNCTION__); | ||
|
|
||
| return reduce($iterable, function ($flattened, $value) { | ||
| return array_merge($flattened, is_array($value) ? array_values($value) : [$value]); | ||
| }, []); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,212 @@ | ||
| <?php | ||
|
|
||
| /** | ||
| * @covers Dash\flatten | ||
| */ | ||
| class flattenTest extends PHPUnit_Framework_TestCase | ||
| { | ||
| /** | ||
| * @dataProvider cases | ||
| */ | ||
| public function test($iterable, $expected) | ||
| { | ||
| $this->assertSame($expected, Dash\flatten($iterable)); | ||
| } | ||
|
|
||
| public function cases() | ||
| { | ||
| $stdClass = (object) ['c' => 10, 'd' => 11]; | ||
| $arrayObject = new ArrayObject(['e' => 12, 'f' => 13]); | ||
|
|
||
| return [ | ||
| 'With nulls' => [ | ||
| 'iterable' => [null, null, null], | ||
| 'expected' => [null, null, null], | ||
| ], | ||
| 'With empty iterable' => [ | ||
| 'iterable' => [], | ||
| 'expected' => [], | ||
| ], | ||
|
|
||
| /* | ||
| With indexed array | ||
| */ | ||
|
|
||
| 'With an indexed array with only scalar values' => [ | ||
| 'iterable' => [ | ||
| 6, | ||
| 1, | ||
| 3, | ||
| ], | ||
| 'expected' => [6, 1, 3] | ||
| ], | ||
| 'With an indexed array with a mix of scalar and non-scalar values' => [ | ||
| 'iterable' => [ | ||
| 4, | ||
| [2, 3], | ||
| ['a' => 7, 'b' => 9], | ||
| $stdClass, | ||
| $arrayObject, | ||
| 8, | ||
| ], | ||
| 'expected' => [4, 2, 3, 7, 9, $stdClass, $arrayObject, 8] | ||
| ], | ||
| 'With an indexed array with only array values' => [ | ||
| 'iterable' => [ | ||
| [2, 3], | ||
| [7,9], | ||
| ], | ||
| 'expected' => [2, 3, 7, 9] | ||
| ], | ||
|
|
||
| /* | ||
| With associative array | ||
| */ | ||
|
|
||
| 'With an associative array with only scalar values' => [ | ||
| 'iterable' => [ | ||
| 'a' => 6, | ||
| 'b' => 1, | ||
| 'c' => 3, | ||
| ], | ||
| 'expected' => [ 6, 1, 3] | ||
| ], | ||
| 'With an associative array with a mix of scalar and non-scalar values' => [ | ||
| 'iterable' => [ | ||
| 'a' => 4, | ||
| 'b' => [2, 3], | ||
| 'c' => ['a' => 7, 'b' => 9], | ||
| 'd' => $stdClass, | ||
| 'e' => $arrayObject, | ||
| 'f' => 8, | ||
| ], | ||
| 'expected' => [4, 2, 3, 7, 9, $stdClass, $arrayObject, 8] | ||
| ], | ||
| 'With an associative array with only array values' => [ | ||
| 'iterable' => [ | ||
| 'b' => [2, 3], | ||
| 'c' => [7,9], | ||
| ], | ||
| 'expected' => [2, 3, 7, 9] | ||
| ], | ||
|
|
||
| /* | ||
| With stdClass | ||
| */ | ||
|
|
||
| 'With an stdClass with only scalar values' => [ | ||
| 'iterable' => (object) [ | ||
| 'a' => 6, | ||
| 'b' => 1, | ||
| 'c' => 3, | ||
| ], | ||
| 'expected' => [6, 1, 3] | ||
| ], | ||
| 'With an stdClass with a mix of scalar and non-scalar values' => [ | ||
| 'iterable' => (object) [ | ||
| 'a' => 4, | ||
| 'b' => [2, 3], | ||
| 'c' => ['a' => 7, 'b' => 9], | ||
| 'd' => $stdClass, | ||
| 'e' => $arrayObject, | ||
| 'f' => 8, | ||
| ], | ||
| 'expected' => [4, 2, 3, 7, 9, $stdClass, $arrayObject, 8] | ||
| ], | ||
| 'With an stdClass with only array values' => [ | ||
| 'iterable' => (object) [ | ||
| 'b' => [2, 3], | ||
| 'c' => [7,9], | ||
| ], | ||
| 'expected' => [2, 3, 7, 9] | ||
| ], | ||
|
|
||
| /* | ||
| With ArrayObject | ||
| */ | ||
|
|
||
| 'With an ArrayObject with only scalar values' => [ | ||
| 'iterable' => new ArrayObject([ | ||
| 'a' => 6, | ||
| 'b' => 1, | ||
| 'c' => 3, | ||
| ]), | ||
| 'expected' => [6, 1, 3] | ||
| ], | ||
| 'With an ArrayObject with a mix of scalar and non-scalar values' => [ | ||
| 'iterable' => new ArrayObject([ | ||
| 'a' => 4, | ||
| 'b' => [2, 3], | ||
| 'c' => ['a' => 7, 'b' => 9], | ||
| 'd' => $stdClass, | ||
| 'e' => $arrayObject, | ||
| 'f' => 8, | ||
| ]), | ||
| 'expected' => [4, 2, 3, 7, 9, $stdClass, $arrayObject, 8] | ||
| ], | ||
| 'With an ArrayObject with only array values' => [ | ||
| 'iterable' => new ArrayObject([ | ||
| 'b' => [2, 3], | ||
| 'c' => [7,9], | ||
| ]), | ||
| 'expected' => [2, 3, 7, 9] | ||
| ], | ||
|
|
||
| /* | ||
| Edge cases | ||
| */ | ||
|
|
||
| 'With deeply nested arrays' => [ | ||
| 'iterable' => [ | ||
| [1, 2], | ||
| [[3, 4]] | ||
| ], | ||
| 'expected' => [1, 2, [3, 4]] | ||
| ] | ||
| ]; | ||
| } | ||
|
|
||
| /** | ||
| * @dataProvider casesTypeAssertions | ||
| * @expectedException InvalidArgumentException | ||
| */ | ||
| public function testTypeAssertions($iterable, $type) | ||
| { | ||
| try { | ||
| Dash\flatten($iterable); | ||
| } | ||
| catch (Exception $e) { | ||
| $this->assertSame( | ||
| "Dash\\flatten expects iterable or stdClass or null but was given $type", | ||
| $e->getMessage() | ||
| ); | ||
| throw $e; | ||
| } | ||
| } | ||
|
|
||
| public function casesTypeAssertions() | ||
| { | ||
| return [ | ||
| 'With an empty string' => [ | ||
| 'iterable' => '', | ||
| 'type' => 'string', | ||
| ], | ||
| 'With a string' => [ | ||
| 'iterable' => 'hello', | ||
| 'type' => 'string', | ||
| ], | ||
| 'With a zero number' => [ | ||
| 'iterable' => 0, | ||
| 'type' => 'integer', | ||
| ], | ||
| 'With a number' => [ | ||
| 'iterable' => 3.14, | ||
| 'type' => 'double', | ||
| ], | ||
| 'With a DateTime' => [ | ||
| 'iterable' => new DateTime(), | ||
| 'type' => 'DateTime', | ||
| ], | ||
| ]; | ||
| } | ||
| } |