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@jdp
Created March 26, 2012 00:44
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Partial function application with PHP
<?php
function foo($a, $b) {
echo "a: {$a} b: {$b}\n";
}
$foo_caller = new PartialCallable('foo', array('A'));
$foo_caller('B');
$foo_caller = partial_function('foo', 'A');
$foo_caller('B');
<?php
class PartialCallable {
function __construct($callable, $args) {
$this->callable = $callable;
$this->args = $args;
}
function __invoke() {
call_user_func_array($this->callable, array_merge($this->args, func_get_args()));
}
}
<?php
function partial_function() {
$applied_args = func_get_args();
return function() use($applied_args) {
return call_user_func_array('call_user_func', array_merge($applied_args, func_get_args()));
};
}
@xeoncross
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@neoascetic
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function partial($func, ...$args) {
    return function (...$margs) use ($func, $args) {
        return $func(...array_merge($args, $margs));
    };
}

@qwhex
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qwhex commented Jun 24, 2018

function partial($func, ...$args) {
    return function (...$newArgs) use ($func, $args) {
        return $func(...array_merge($args, $newArgs));
    };
}

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