<?php
namespace eMacros\Runtime\Collection;
use eMacros\Applicable;
use eMacros\Scope;
use eMacros\GenericList;
use eMacros\Symbol;
class ArrayWalk implements Applicable {
/**
* Applies the user-defined callback function to each element of an array.
* Usage: (Array::walk _arr _callback)
* Returns: boolean
* (non-PHPdoc)
* @see \eMacros\Applicable::apply()
*/
public function apply(Scope $scope, GenericList $arguments) {
$nargs = count($arguments);
if ($nargs == 0) {
throw new \BadFunctionCallException("ArrayWalk: No target specified.");
}
elseif ($nargs == 1) {
throw new \BadFunctionCallException("ArrayWalk: No callback specified.");
}
$target = $arguments[0];
if (!($target instanceof Symbol)) {
throw new \InvalidArgumentException(sprintf("ArrayWalk: Expected symbol as first argument but %s was found instead.", substr(strtolower(strstr(get_class($arguments[0]), '\\')), 1)));
}
$ref = $target->symbol;
if (is_array($scope->symbols[$ref]) || $scope->symbols[$ref] instanceof \ArrayObject) {
$op = $arguments[1]->evaluate($scope);
if (is_callable($op)) {
$userdata = $nargs > 2 ? $arguments[2]->evaluate($scope) : null;
return array_walk($scope->symbols[$ref], $op, $userdata);
}
throw new \InvalidArgumentException("ArrayWalk: Expected callable as second argument.");
}
throw new \InvalidArgumentException(sprintf("ArrayWalk: Expected array as first argument but %s was found instead.", gettype($scope->symbols[$ref])));
}
}
?>
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