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

[rp_param]

Description

Link: [rp_param]

Author: Randy Phillips

Category: Client

Version: 8.5.x

License: Public Domain

Posted: Jun. 25, 2007

Updated: Jul. 13, 2007

More by this author...

I created this tag to bypass the "built in" error that occurs when the find->get element does not exist in a pair array. It gets values from pair arrays such as client_postparams or client_getparams without throwing an error when the element does not exist. Instead it silently returns a NULL value.

Parameters

-pairs	array, required	Takes an array of pairs only
-find	string, required	The element in the array you wish to find
-instance	integer, optional	Used for multiple elements of the same name to designate the instance or index of the desired element.

Sample Usage

local('fruit' = (array: 'item1' = 'apples', 'item2' = 'bananas', 'item1' = 'strawberries', 'item3' = 'oranges'));

(rp_param: -pairs=(#fruit), -find='item1');

//->apples

(rp_param: -pairs=(#fruit), -find='item1', -instance=2);

//->strawberries

(rp_param: -pairs=(#fruit), -find='item1', -instance=3);

//->NULL

(rp_param: -pairs=(#fruit), -find='item7');

//->NULL

Source Code

Click the "Download" button below to retrieve a copy of this tag, including the complete documentation and sample usage shown on this page. Place the downloaded ".inc" file in your LassoStartup folder, restart Lasso, and you can begin using this tag immediately.

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define_tag:'param', -namespace='rp_',
	
	-required='pairs', -type=array,
	
	-required='find',
	
	-optional='instance';
	
	!(local_defined:'instance') ? local('instance' = 1);
	
	!(local_defined:'value') ? local('value' = NULL);
	
	local('param_count' = #pairs->(find:#find)->size);
	
	
	loop(#param_count);
	
		local('value' = #instance <= (loop_count) ? #pairs->(find:#find)->(get:#instance)->value | NULL);
	
	/loop;
	
		return: #value;
		
/define_tag;

Related Tags

Comments

06/25/2007, Johan Sölve
Horray!
Great, Randy!