rem: if (!(key in this.object)) return this; delete this.object[key]; 
add: if (!(key in this.obj)) return this; delete this.obj[key]; 
context: 	remove: function(key){		if (!(key in this.object)) return this;		delete this.object[key];		this.length--;		return this;	},
meta: 5237	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5237/91c94c57e656870f49ffd11ba4153c75022f94b8/Hash.js/clean/Plugins/Hash.js