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Merged
pyldin601 merged 2 commits into from
Oct 23, 2016
Merged

add deepMap and flatten #12

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2c7bf9c
add deepMap and flatten
Oct 23, 2016
63b1ceb
Merge branch 'master' into arrays
Oct 23, 2016
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27 changes: 27 additions & 0 deletions src/Nerd/Common/Arrays.php
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Original file line number Diff line number Diff line change
Expand Up @@ -103,3 +103,30 @@ function append(array $array, $item)
$array[] = $item;
return $array;
}

/**
* Flatten array.
*
* @param array $array
* @return mixed
*/
function flatten(array $array)
{
return array_reduce($array, function ($result, $item) {
return is_array($item) ? array_merge($result, flatten($item)) : append($result, $item);
}, []);
}

/**
* Map multidimensional arrays.
*
* @param array $array
* @param callable $callable
* @return mixed
*/
function deepMap(array $array, callable $callable)
{
return array_reduce($array, function ($result, $item) use (&$callable) {
return append($result, is_array($item) ? deepMap($item, $callable) : $callable($item));
}, []);
}
76 changes: 44 additions & 32 deletions tests/ArraysTest.php
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Expand Up @@ -2,14 +2,9 @@

namespace tests;

use function Nerd\Common\Arrays\append;
use function Nerd\Common\Arrays\arrayOf;
use function Nerd\Common\Arrays\toHeadTail;
use Nerd\Common\Arrays;
use PHPUnit\Framework\TestCase;

use function Nerd\Common\Arrays\all;
use function Nerd\Common\Arrays\any;

use const Nerd\Common\Arrays\TEST_KEY;
use const Nerd\Common\Arrays\TEST_BOTH;

Expand All @@ -20,81 +15,98 @@ public function testAllValue()
$test = function ($item) {
return $item > 0;
};
$this->assertFalse(all([-10, -5, 0, 10, 20], $test));
$this->assertTrue(all([10, 15, 20], $test));
$this->assertTrue(all([], $test));
$this->assertFalse(Arrays\all([-10, -5, 0, 10, 20], $test));
$this->assertTrue(Arrays\all([10, 15, 20], $test));
$this->assertTrue(Arrays\all([], $test));
}

public function testAllKey()
{
$test = function ($key) {
return strlen($key) == 2;
};
$this->assertFalse(all(["aa" => 15, "abc" => 10], $test, TEST_KEY));
$this->assertTrue(all(["aa" => 155, "ab" => 10], $test, TEST_KEY));
$this->assertTrue(all([], $test, TEST_KEY));
$this->assertFalse(Arrays\all(["aa" => 15, "abc" => 10], $test, TEST_KEY));
$this->assertTrue(Arrays\all(["aa" => 155, "ab" => 10], $test, TEST_KEY));
$this->assertTrue(Arrays\all([], $test, TEST_KEY));
}

public function testAllBoth()
{
$test = function ($value, $key) {
return strlen($key) == 2 && $value > 0;
};
$this->assertFalse(all(["a" => -10, "b" => 15, "ab" => 20], $test, TEST_BOTH));
$this->assertTrue(all(["ab" => 15, "cc" => 20], $test, TEST_BOTH));
$this->assertTrue(all([], $test, TEST_BOTH));
$this->assertFalse(Arrays\all(["a" => -10, "b" => 15, "ab" => 20], $test, TEST_BOTH));
$this->assertTrue(Arrays\all(["ab" => 15, "cc" => 20], $test, TEST_BOTH));
$this->assertTrue(Arrays\all([], $test, TEST_BOTH));
}

public function testAnyValue()
{
$test = function ($item) {
return $item > 0;
};
$this->assertTrue(any([-10, -5, 0, 10, 20], $test));
$this->assertTrue(any([10, 15, 20], $test));
$this->assertFalse(any([-10, -5, -1], $test));
$this->assertFalse(any([], $test));
$this->assertTrue(Arrays\any([-10, -5, 0, 10, 20], $test));
$this->assertTrue(Arrays\any([10, 15, 20], $test));
$this->assertFalse(Arrays\any([-10, -5, -1], $test));
$this->assertFalse(Arrays\any([], $test));
}

public function testAnyKey()
{
$test = function ($key) {
return strlen($key) == 2;
};
$this->assertTrue(any(["aa" => 15, "abc" => 10], $test, TEST_KEY));
$this->assertFalse(any(["aaa" => 155, "abc" => 10], $test, TEST_KEY));
$this->assertFalse(any([], $test, TEST_KEY));
$this->assertTrue(Arrays\any(["aa" => 15, "abc" => 10], $test, TEST_KEY));
$this->assertFalse(Arrays\any(["aaa" => 155, "abc" => 10], $test, TEST_KEY));
$this->assertFalse(Arrays\any([], $test, TEST_KEY));
}

public function testAnyBoth()
{
$test = function ($value, $key) {
return strlen($key) == 2 && $value > 0;
};
$this->assertTrue(any(["a" => -10, "b" => 15, "ab" => 20], $test, TEST_BOTH));
$this->assertTrue(any(["ab" => 15, "cc" => 20], $test, TEST_BOTH));
$this->assertFalse(any([], $test, TEST_BOTH));
$this->assertFalse(any(["a" => 15, "ab" => -15], $test, TEST_BOTH));
$this->assertTrue(Arrays\any(["a" => -10, "b" => 15, "ab" => 20], $test, TEST_BOTH));
$this->assertTrue(Arrays\any(["ab" => 15, "cc" => 20], $test, TEST_BOTH));
$this->assertFalse(Arrays\any([], $test, TEST_BOTH));
$this->assertFalse(Arrays\any(["a" => 15, "ab" => -15], $test, TEST_BOTH));
}

public function testArrayOf()
{
$this->assertEquals([1, 2, 3], arrayOf(1, 2, 3));
$this->assertEquals([1], arrayOf(1));
$this->assertEquals([], arrayOf());
$this->assertEquals([1, 2, 3], Arrays\arrayOf(1, 2, 3));
$this->assertEquals([1], Arrays\arrayOf(1));
$this->assertEquals([], Arrays\arrayOf());
}

public function testSplitHeadTail()
{
$this->assertEquals([1, [2, 3]], toHeadTail(arrayOf(1, 2, 3)));
$this->assertEquals([null, []], toHeadTail(arrayOf()));
$this->assertEquals([1, [2, 3]], Arrays\toHeadTail(Arrays\arrayOf(1, 2, 3)));
$this->assertEquals([null, []], Arrays\toHeadTail(Arrays\arrayOf()));
}

public function testAppend()
{
$source = [1, 2, 3];
$target = append($source, 4);
$target = Arrays\append($source, 4);
$this->assertEquals([1, 2, 3, 4], $target);
$this->assertNotSame($source, $target);
}

public function testFlatten()
{
$source = [1, [2, 3, 4], [5], [[6], 7], 8, [[9]]];
$expected = [1, 2, 3, 4, 5, 6, 7, 8, 9];
$this->assertEquals($expected, Arrays\flatten($source));
}

public function testDeepMap()
{
$source = [1, [2, 3, 4], [5], [[6], 7], 8, [[9]]];
$func = function ($item) {
return $item * 2;
};
$expected = [2, [4, 6, 8], [10], [[12], 14], 16, [[18]]];
$this->assertEquals($expected, Arrays\deepMap($source, $func));
}
}