一个数组,根据数组中某个元素,合并数组 // 需要被合并的数组,把Index相同的数组合并 const arr = [{id:0,name:'张三'}, {id:0,name:'李四'}, {id:1,name:'王五'}, {id:1,name:'张伟'}, {id:2,name:'张江'}, ] var map = {}, result = []; for(var i = 0; i < arr.length; i++){ var ai = arr[i]; if(!map[ai.id]){ r
转自:http://blog.csdn.net/laozhaokun/article/details/37531247 题目:有两个有序数组a,b,现需要将其合并成一个新的有序数组. 简单的思路就是先放到一个新的数组中,再排序.但是这样的没体现任何算法,这里考的不是快速排序等排序算法.关键应该是如何利用有序已知这个条件.可以这样想,假设两个源数组的长度不一样,那么假设其中短的数组用完了,即全部放入到新数组中去了,那么长数组中剩下的那一段就可以直接拿来放入到新数组中去了. public class
In a given integer array A, we must move every element of A to either list B or list C. (B and C initially start empty.) Return true if and only if after such a move, it is possible that the average value of B is equal to the average value of C, and