rem: return this[this.length - 1] || null; 
add: return (this.length) ? this[this.length - 1] : null; 
context: 	getLast: function(){		return this[this.length - 1] || null;	}
meta: 8516	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8516/c27654d357a2e4e99d83f1bddd296112f26aff73/Array.js/buggy/Native/Array.js