《剑指offer》— JavaScript（6）旋转数组的最小数字

function minNumberInRotateArray(rotateArray)
{
    var len=rotateArray.length;
    if(len== 0 || !rotateArray) return 0;
    
    var low=0;
    var high=len-1;
    
    while(low<high){
         var mid=low + Math.floor((high-low)/2);
        
         if(rotateArray[mid]>rotateArray[high]){
             low = mid+1;
         }else if(rotateArray[mid]==rotateArray[high]){
             high=high-1;
         }else{
             high=mid;
         }
        
    }
    return rotateArray[low];
    
      
}
module.exports = {
    minNumberInRotateArray : minNumberInRotateArray
};