JavaScript Magic Technology

uncarryThis.js

/**
 * call wrapper function is equal to use call/apply to invoke function
 * see follow usage
 * 
 * @param {Function} f - need to wrapper function
 */
var uncurryThis = function(f) {
  var call = Function.call;
  return function() {
    return call.apply(f, arguments);
  };
};

// This is equivalent, but slower
// uncurryThis = Function.bind.bind(Function.bind.call);
// http://jsperf.com/uncurrythis

// usage
var toString = uncurryThis(Object.prototype.toString)
toString(1); // '[object Number]'
toString('2'); // '[object String]'
toString({}); // '[object Object]'
// is equal to 
Object.prototype.toString.call(1);
// or
Object.prototype.toString.apply(1);