core-js/src/number.js

Standard library

!function(){  
  function NumberIterator(iterated){
    set(this, ITER, {l: toLength(iterated), i: 0});
  }
  createIterator(NumberIterator, NUMBER, function(){
    var iter = this[ITER]
      , i    = iter.i++;
    return i < iter.l ? iterResult(0, i) : iterResult(1);
  });
  defineIterator(Number, NUMBER, function(){
    return new NumberIterator(this);
  });
  
  $define(PROTO + FORCED, NUMBER, {
    random: function(lim /* = 0 */){
      var a = +this
        , b = lim == undefined ? 0 : +lim
        , m = min(a, b);
      return random() * (max(a, b) - m) + m;
    }
  });

  $define(PROTO + FORCED, NUMBER, turn.call(
    array(
      // ES3:
      'round,floor,ceil,abs,sin,asin,cos,acos,tan,atan,exp,sqrt,max,min,pow,atan2,' +
      // ES6:
      'acosh,asinh,atanh,cbrt,clz32,cosh,expm1,hypot,imul,log1p,log10,log2,sign,sinh,tanh,trunc'
    ),
    function(memo, key){
      var fn = Math[key];
      if(fn)memo[key] = function(/* ...args */){
        // ie9- dont support strict mode & convert `this` to object -> convert it to number
        var args = [+this]
          , i    = 0;
        while(arguments.length > i)args.push(arguments[i++]);
        return invoke(fn, args);
      }
    }, {}
  ));
}();