Drop it

function drop(arr, func) {
  // Drop them elements.
  //return arr;
  var tmp;
      var res = [];
      for(var i=0,len=arr.length;i<len;i++){
          tmp = arr.shift();
          if(func(tmp)){
            //需要置回弹出的元素
            arr.unshift(tmp);
            break;
          }
      }
      
      return arr;
}

drop([1, 2, 3], function(n) {return n < 3; });

　　或

function drop(arr, func) {
  // Drop them elements.
  //return arr;
  while(!func(arr[0]) && arr.length > 0){
    arr.shift();
  }
      
      return arr;
}

drop([1, 2, 3], function(n) {return n < 3; });