Prototype ¬ Detail

author: mga [+], Submitted: 07.09.03 7p • Last Edit: 12.12.06 9a

/***************************************************************************
Copyright (C) 2001-2007 Mauricio Giraldo
http://www.pingpongestudio.com

findObjectKeyValue:
--------------------
If you have an array of objects and need to extract one of them given a
UNIQUE key,value pair here's the prototype. If not unique will return the
first object found.

findObjectPosition:
------------------
If you have an array of objects and need to know in which position an
object with a given UNIQUE key,value pair has here's the prototype.
If not unique will return the first position found.
****************************************************************************/

Array.prototype.findObjectKeyValue = function (key,value) { 
	var len = this.length; 
	var i; 
	for (i=0;i<len;i++) {
		if (this[i][key] == value) return this[i]; 
	}
}

Array.prototype.findObjectPosition = function (key,value) { 
	var len = this.length; 
	var i; 
	for (i=0;i<len;i++) {
		if (this[i][key] == value) return i; 
	}
}

usage

arr = [{firstname:"bob",lastname:"patino"},{firstname:"bart",lastname:"simpson"},{firstname:"john",lastname:"doe"}];
dude = arr.findObjectKeyValue ("lastname","simpson");
trace(dude.firstname); // displays "bart"
position = arr.findObjectPosition ("lastname","simpson");
trace(position); // displays 1