[array_shuffle] at tagSwap.net: Open Source Lasso Code

[array_shuffle]

Description

Link: [array_shuffle]

Author: Jason Huck

Category: Array

Version: 8.x

License: Public Domain

Posted: Oct. 24, 2005

Updated: Oct. 24, 2005

More by this author...

Returns the given array in a new, random order.

Parameters

none

Sample Usage

var('orderedItems') = array(1,2,3,4,5);
var('shuffledItems') = array_shuffle($orderedItems);
$orderedItems;

// -> array: (3),(2),(1),(5),(4)

Source Code

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define_tag(
	'shuffle',
	-namespace='array_',
	-priority='replace',
	-description='Returns the given array in a new, random order.'
);
	fail_if(
		!params->size || !params->first->isa('array'),
		-1,
		'[array_shuffle] requires an array as a parameter.'
	);
	
	local(
		'in' = params->first,
		'out' = array
	);
	
	#out->reserve(#in->size);
	
	while(#in->size);
		local('x') = math_random(
			-lower=1, 
			-upper=#in->size
		);

		#out->insert(#in->get(#x));	
		#in->remove(#x);
	/while;
	
	return(#out);
/define_tag;

Related Tags

[array_unique]

Comments

03/29/2010, Dominique Guardiola
I love tagswap
Just typed 'lasso array shuffle' in Google, tadaaa, thanks jason!