题解 | #二分查找-I#

	function search( nums ,  target ) {
   
    var left=0;
    var right=nums.length-1;
    while(left<=right){
        if(nums[left]===target){
            return left
        }else if(nums[right]===target){
            return right;
        }
            
        
        left++;
        right--;
    }
    return -1;
}