Nodejs Function Bind bind(oThis)

Method Source Code

Function.prototype.bind = Function.prototype.bind || function (oThis) {
  if( typeof this !== "function" ) {
    throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
  }//from   ww  w  .ja va2s.  c  om

  var aArgs = Array.prototype.slice.call(arguments, 1),
    fToBind = this,
    fNOP = function () {},
    fBound = function () {
      return fToBind.apply(
        (this instanceof fNOP && oThis ? this : oThis),
        aArgs.concat(Array.prototype.slice.call(arguments))
      );
    };

  fNOP.prototype = this.prototype;
  fBound.prototype = new fNOP();

  return fBound;
};

Related

1. bindArg()

   Function.prototype.bindArg = function () {
       var args = arguments,
           that = this;
       return function () {
           that.apply(this, args);
       };
   };
   

2. bind(a)

   Function.prototype.bind = function (a)
     if (arguments.length < 2 && typeof arguments[0] === 'undefined') return this;
     var b = this,
       c = Array.prototype.slice.call(arguments).slice(1);
     return function ()
       var d = c.concat(Array.prototype.slice.call(arguments));
       return b.apply(a, d)
   ...
   

3. bind(scope)

   Function.prototype.bind = function(scope) {
     var _function = this;
     return function() {
       return _function.apply(scope, arguments);
   };
   String.prototype.trim = function () {
       return this.replace(/^\s*/, '').replace(/\s*$/, '');
   };
   ...
   

4. bind(scope)

   Function.prototype.bind = function(scope) {
     var _function = this;
     return function() {
       return _function.apply(scope, arguments);
   

5. bindbind(self)

   Function.prototype.bind = function bind(self) {
     var callable = this;
     return function binding() { return callable.apply(self, arguments.toArray()); };
   

6. bind(scope)

   Function.prototype.bind = function(scope) {
       var func = this;
       return function() {
           return func.apply(scope, arguments);
       };
   };
   

7. bind( obj )

   Function.prototype.bind = function( obj ) {
     var slice = [].slice,
       args = slice.call(arguments, 1), 
       self = this, 
       nop = function () {}, 
       bound = function () {
         return self.apply( this instanceof nop ? this : ( obj || {} ), 
                   args.concat( slice.call(arguments) ) );  
       };
   ...
   

8. bind(bind)

   Function.prototype.bind = function (bind) {
       var self = this;
       return function () {
           var args = Array.prototype.slice.call(arguments);
           return self.apply(bind || null, args);
       };
   };
   

9. rebind(n)

   Function.prototype.rebind = function (n) {
       var me = this;
       return function () {
           var res = me.apply();
           var f = res && res[n];
           if(typeof f !== 'function') throw 'routed property was not a function.';
           f.apply(null, arguments);
       };
   };
   ...