向Array中添加二分插入排序

二分插入排序思路

先在有序区通过二分查找的方法找到移动元素的起始位置，然后通过这个起始位置将后面所有的元素后移。

二分插入排序实现

Function.prototype.method = function(name, func){
    this.prototype[name] = func;
    return this;
};

Array.method('bInsertSort', function(){
    var len = this.length,
        i, j, tmp, low, high, mid;
    for(i=1; i<len; i++){
        tmp = this[i];
        low = 0;
        high = i - 1;
        while(low <= high){
            mid = (low+high)/2;
            if(tmp < this[mid]) high = mid - 1;
            else low = mid + 1;
        }
        for(j=i-1; j>=high+1; j--){
            this[j+1] = this[j];            
        }
        this[j+1] = tmp;
    }
    return this;
});