rem: var last = parseInt( this.length ) - 1; obj = this[last]; this.length = last; 
add: var obj; if( this instanceof Array && this.length > 0 ) { var last = parseInt( this.length ) - 1; obj = this[last]; this.length = last; } return obj; 
context: function Array_pop(){	var obj;	if( this instanceof Array && this.length > 0 )	{		var last = parseInt( this.length ) - 1;		obj = this[last];		this.length = last;	}	return obj;}
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