Array.apply(null, {length: N}).map(Function.call, Number);Array.apply(0,Array(100)).map(function(item,index){return index})

var prime = function(len){    var i,j;    var arr = [];       for(i = 1; i < len; i++){    for(j=2; j < i; j++){        if(i%j === 0) {         break;      }    }         if(i <= j && i !=1){      arr.push(i);    }      }  return arr;};console.log(prime(100));