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sbovyrin / std-php
PHP standard library that we want
2.2.0
2021-06-16 10:44 UTC
Requires
- php: >=7.4.0
This package is auto-updated.
Last update: 2022-10-16 13:59:21 UTC
README
Auto-included when used with composer
Docs
head
Returns first element of indexed array or string.
<?php head([3,4,5,6]); // -> 3 head([3]); // -> 3 head([]); // -> throw type error head(''); // -> throw type error head('hello'); // -> 'h' head('h'); // -> 'h' snd([3,4,5,6]); // -> 4 snd([3]); // -> throw type error snd([]); // -> throw type error snd(''); // -> throw type error snd('hello'); // -> 'e' snd('h'); // -> throw type error
tail
Returns all elements except first of indexed array or string.
<?php tail([3,4,5,6]); // -> [4,5,6] tail([3]); // -> [] tail([]); // -> [] tail(''); // -> '' tail('hello'); // -> 'ello' tail('h'); // -> ''
last
Returns last element of indexed array or string.
<?php last([3,4,5,6]); // -> 6 last([3]); // -> 3 last([]); // -> throw type error last(''); // -> throw type error last('hello'); // -> 'o' last('h'); // -> 'h'
init
Returns all elements except last of indexed array or string.
<?php init([3,4,5,6]); // -> [3,4,5] init([3]); // -> [] init([]); // -> [] init(''); // -> '' init('hello'); // -> 'hell' init('h'); // -> ''
len
Returns length of array or string.
<?php len(['name' => 'John', 'age' => 21]); // -> 2 len([3,4,5,6]); // -> 4 len([3]); // -> 1 len([]); // -> 0 len(''); // -> 0 len('h'); // -> 1
reverse
Returns reversed indexed array or string.
<?php reverse([3,4,5,6]); // -> [6,5,4,3] reverse([3]); // -> [3] reverse([]); // -> [] reverse(''); // -> '' reverse('hello'); // -> 'olleh'
fold
Accumulates values into value using a function and initial value.
<?php function sum($a, $b) { return $a + $b; } fold('sum', 0)([1,2,3,4]); // -> 10
reduce
Accumulates values into value using a function.
<?php function sum($a, $b) { return $a + $b; } reduce('sum')([1,2,3,4]); // -> 10
filter
Filters values using a predicate function.
<?php function isEven($a) { return $a % 2 === 0; } filter('isEven')([1,2,3,4]); // -> [2,4]
map
Applies a function to each element in array.
<?php function addTwo($a) { return $a + 2; } map('addTwo')([1,2,3,4]); // -> [3,4,5,6]
partial
Returns partial applied function.
<?php function sum($a, $b) { return $a + $b; } $addTen = partial('sum', 10); map($addTen)([1,2,3,4,5]); // -> [11,12,13,14,15]
comp
Returns functions composition.
<?php function double($a) { return $a * 2; } $getSecondDoubledElement = comp( 'head', 'tail', partial('map', 'double') ); $getSecondDoubledElement([1,2,3,4]); // -> 4