rem: if (this.has(key)) delete this[key]; 
add: if (this.hasOwnProperty(key)) delete this[key]; 
context: 	remove: function(key){		if (this.has(key)) delete this[key];		return this;	},
meta: 9980	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9980/7f57639a9463cd4e2577f39af7503ce7d0e73459/Hash.js/buggy/Source/Native/Hash.js