Problem: given an array that contains duplicates (except one value), find the one value that does not have a duplicate in that array. Explain the complexity of your algorithm. So in the array: A = [2, 3, 4, 5, 2, 3, 4] your algorithm should return 5…

When I had the requirement to remove duplicate items from a very large array, I found out that the classic method to be not optimized as it took a pretty long time than desired. So, I devised this new algorithm that can sort a large array in a fracti…

错误描述: These columns don't currently have unique values. Content deployment job 'job name' failed.The exception thrown was 'System.ArgumentException' : 'These columns don't currently have unique values.' 错误截图,如下图: 错误日志位置,如下图: 在服务器上找到错误日志的位置,是压缩包,记得找对G…

在Tomcat的server.xml中配置两个context,出现其中一个不能正常启动,交换配置顺序,另一个又不能正常启动,即始终只有第二个配置能启动的情况.如果单独部署,都没有问题.报错大致内容如下: appears to have started a thread named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] but has failed to stop it. This is very lik…

In this lesson, we'll grab arrays of values from other arrays, resulting in a nested array. From there, we'll look at multiple ways to flatten the array structure using composition with map and unnest and then refactoring to use chain, AKA flatMap. F…

给定一个数组,其中每个元素出现两次,除了一对(两个元素).找到这个唯一对的元素. 输入:第一行输入包含一个表示测试用例数的整数T.然后T测试用例如下.每个测试用例由两行组成.每个测试用例的第一行包含整数N表示数组的大小,第二行包含N个空格分隔元素. 输出:对于每个测试用例, 在新行中以增加的顺序打印唯一对. 约束:1 <= T <= 100 1 <= N <= 10 31 <= A [i] <= 10 3 示例:输入:2 6 2 2 5 5 6 7 4 1 3 4 1…

应该是tomcat下部署了多个项目且都使用log4j. <!--如果不定义webAppRootKey参数,那么webAppRootKey就是缺省的"webapp.root".但最好设置,以免项目之间的名称冲突. 定义以后,在Web Container启动时将把ROOT的绝对路径写到系统变量里. 然后log4j的配置文件里就可以用${webName.root }来表示Web目录的绝对路径,把log文件存放于webapp中. 此参数用于后面的“Log4jConfigListener”…

大意是Log4jConfigListener在获取webapp.root值时,被后一context的值替换掉了,所以要在各个项目的web.xml中配置不同的webAppRootKey值,随即在其中一个web.xml中添加: <context-param> <param-name>webAppRootKey</param-name> <param-value>web.sample.root</param-value> </context-pa…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 自定义排序 日期 题目地址:https://leetcode-cn.com/problems/the-k-strongest-values-in-an-array/ 题目描述 给你一个整数数组 arr 和一个整数 k . 设 m 为数组的中位数,只要满足下述两个前提之一,就可以判定 arr[i] 的值比 arr[j] 的值更强: |arr[i] - m…

Array.prototype.unique1 = function() { var n = []; for(var i = 0; i < this.length; i++) { if (n.indexOf(this[i]) == -1) n.push(this[i]); } return n; } Array.prototype.unique2 = function() { var n = {},r=[]; for(var i = 0; i < this.length; i++) { if…