#C/C++
rmq算法
1. 概述 RMQ（Range Minimum/Maximum Query），即区间最值查询，是指这样一个问题：对于长度为n的数列A，回答若干询问RMQ（A,i,j）(i,j<…
#Java
Android中两种播放声音的方法
- 播放声音 - MediaPlayer 播放器, 同时只能播放一个音乐. 可以播放大文件. 播放背景音乐. MediaPlayer mediaPlayer = new Media…
#C/C++
后缀数组之倍增算法
#include<stdio.h> #include<string.h> #include<iostream> using namespace …
#Ruby
ruby编写的乘法口诀代码
TEST_FILE_NAME = '乘法口诀.txt' #创建文件 File.open(TEST_FILE_NAME, 'w+') do |file| for x in 1..9 …
#Java
java 字符串系列化及反系列化
/** * 字符串序列化 * @param str * @return */ public static String compareSerialization(String st…
#Java
利用Apache commons exec 实现指定应用打开对应文件
在实际工作中，我们有时候需要指定某一个应用，打开某一个文件。比如用播放器打开一个MP3音乐文件，用记事本打开一个…
#Java
Java 邮件发送代码
发送邮件 1、MailOperation.java 主要文件，邮件操作，发送 package main; import java.util.Date; import java.ut…
#Objective-C
单例
+ (instancetype)sharedInstance { static id sharedInstance = nil; static dispatch_once_t on…
#SQL
查找替换表中TEXT字段类型数据
SELECT REPLACE(SUBSTRING(Comment,1,DATALENGTH(Comment)),',','##') FROM COMPANY
#Objective-C
iOS webview开发浏览器，屏蔽地址栏无关地址
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request na…
#PHP
PHP运行时强制显示出错信息
error_reporting(E_ALL); ini_set('display_errors', '1'); //将出错信息输出到一个文本文件 ini_set('error_lo…
#SQL
查询从未使用的索引
SELECT object_name(object_id) ,* sys.dm_db_index_usage_state WHERE user_seeks = 0 AND user…
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