javascript利用apply和arguments复用方法(2)

var modelMethods = ['keys', 'values', 'pairs', 'invert', 'pick', 'omit'];

// Mix in each Underscore method as a proxy to `Model#attributes`.
_.each(modelMethods, function(method) {
  Model.prototype[method] = function() {
    var args = slice.call(arguments);
    args.unshift(this.attributes);
    return _[method].apply(_, args);
  };
});

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