| title | tags |
|---|---|
|
compose
|
function,intermediate
|
Return a new function that composes multiple functions into a single callable.
- Use
array_reduce()to perform right-to-left function composition.
function compose(...$functions)
{
return array_reduce(
$functions,
function ($carry, $function) {
return function ($x) use ($carry, $function) {
return $function($carry($x));
};
},
function ($x) {
return $x;
}
);
}
$compose = compose(
// add 2
function ($x) {
return $x + 2;
},
// multiply 4
function ($x) {
return $x * 4;
}
);
$compose(3); // 20
Tags: PHP, PHP array, array_reduce, compose, multiple functions, numbers, maths, single, callable
