rem: if (this.obj[key] == undefined) return false; 
add: if (this.obj[key] === undefined) return this; 
context: 	remove: function(key) {		if (this.obj[key] == undefined) return false;		var obj = {};		this.length--;		for (var property in this.obj){			if (property != key) obj[property] = this.obj[property];		}		this.obj = obj;		return this;	},
meta: 6317	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/6317/2f00bcee8e2a9577e18cd8c5c5c7c594651a3811/Hash.js/clean/Addons/Hash.js