Array.prototype.findSort=function(num1) {
  var hasSortArr=this;
  var l=0,r=hasSortArr.length;
  var lock=-1;
  var dis=0;
  var dis1=0,dis2=0;
  if(hasSortArr.length>0){
    dis1=num1-hasSortArr[0];
    if(dis1<=0){
      return [0,dis1]
    }
    dis2=num1-hasSortArr[r-1];
    if(dis2>=0){
      return [r-1,dis2]
    }
    while(lock===-1){
      var m=(l+r+1)>>1;
      //比较下坐标大小
      dis=num1-hasSortArr[m]
      if(dis>0){
        if(m+1===r){
          if(dis>-dis2){
            lock=r;
            dis=dis2;
          }else{
            lock=m;
          }
        }else{
          dis1=dis;
          l=m
        }
      }else if(dis<0){
        if(l+1===m){
          if(-dis>=dis1){
            lock=l;
            dis=dis1;
          }else{
            lock=m;
          }
        }else{
          dis2=dis;
          r=m
        }
      }else{
        lock=m;
      }
    }
    return [lock,dis]
  }
  return [lock,dis]
}