stapes.js
function() {
            var args = slice.call(arguments);
            args.unshift(this);
            return _.extend.apply(this, args);
        }
function() {
            var args = slice.call(arguments);
            args.unshift(this);
            return _.extend.apply(this, args);
        }
function ( ) { var args = slice . call ( arguments ) ; args . unshift ( this ) ; return _ . extend . apply ( this , args ) ; }
The same as extend, but uses the this value as the scope
The same as extend but uses the this value as the scope