Nodejs Random Number Get iRandom(a, b)

Method Source Code

Math.iRandom = function(a, b){
   if (arguments.length == 1){
      return Math.round(Math.random() * a);
   }else if (arguments.length == 2){
      return a + Math.round(Math.random() * (b - a));
   }/*  ww  w . ja va 2s. c o m*/
};

Related

1. rand(l, u)

   Math.rand = function (l, u) {
     return Math.floor((Math.random() * (u - l + 1)) + l);
   };
   

2. rand(min, max)

   Math.rand = function(min, max) { 
     return Math.floor(Math.random() * (max - min) + min); 
   

3. range(a, b)

   Math.range = function (a, b) {
     return this.floor(this.random() * a) + b;
   };
   

4. random(_minNum,_maxNum,_rejArr)

    function random(_minNum,_maxNum,_rejArr){
        var minNum=_minNum||4,
            maxNum=_maxNum||17,
            rejArr=_rejArr||[],
            num=-1,
            flag=true;
        num = Math.floor(Math.random()*(maxNum-minNum+1)+minNum);
        if(rejArr.length>maxNum-minNum) return -1;
        for(var i=0,len=rejArr.length;i<len;i++){
   ...