Nosql之Redis: string数据类型及操作命令
strings 类型 : ? 设置KEY对应的值为STRING类型的value. ? 最简单的数据,是二进制安全的.可以包含任何数据. ? 比如jpg图片或者序列化的对象. ?? 操作: set name value; ?? 2: setnx 设置KEY对应的值为STRING类型的value.如果key已经存存,返回0; 3: setex? 设
strings 类型:
? 设置KEY对应的值为STRING类型的value.
? 最简单的数据,是二进制安全的.可以包含任何数据.
? 比如jpg图片或者序列化的对象.
?? 操作: set name value;
??
2: setnx 设置KEY对应的值为STRING类型的value.如果key已经存存,返回0;
3: setex? 设置KEY对应的值为STRING类型的value.并指定此键值对应的有效期.
?? setex twnmae 10 red;
??
4: setrange 设置指定KEY的value值的子符串.
??
?? setrange name 6 tangwen.org?? 设置从第6个字符开始替换成tangwen.org.
5: mset 一次设置多个KEY的值.成功返回0k,失败返回0;
? mset key1 value1 key2 value2
6:getset
?设置key的新值,并返回key的旧值
7:getrange 获取子字符串.
? getrange name 0,6? 获取下标从0开始到6的字符
8:mget
? 批量获取,对应KEY不存在时则对应返回nil.
9: incr
?? 对KEY的值递增.
10:incrby
? incrby key 5;对key递增5个.
如:
redis 127.0.0.1:6379> set key1 12
OK
redis 127.0.0.1:6379> get key1
“12″
redis 127.0.0.1:6379> incr key1
(integer) 13
redis 127.0.0.1:6379> incrby key1 2
(integer) 15
redis 127.0.0.1:6379>
11: decr 对key的值做减减操作.
12 decrby 同decr类似,减指定值.
13: append 给指定KEY的字符串追加value,返回新字符串值的长度
Nosql之Redis在centos下安装

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

1. Start the [Start] menu, enter [cmd], right-click [Command Prompt], and select Run as [Administrator]. 2. Enter the following commands in sequence (copy and paste carefully): SCconfigwuauservstart=auto, press Enter SCconfigbitsstart=auto, press Enter SCconfigcryptsvcstart=auto, press Enter SCconfigtrustedinstallerstart=auto, press Enter SCconfigwuauservtype=share, press Enter netstopwuauserv , press enter netstopcryptS

Recently, the military circle has been overwhelmed by the news: US military fighter jets can now complete fully automatic air combat using AI. Yes, just recently, the US military’s AI fighter jet was made public for the first time and the mystery was unveiled. The full name of this fighter is the Variable Stability Simulator Test Aircraft (VISTA). It was personally flown by the Secretary of the US Air Force to simulate a one-on-one air battle. On May 2, U.S. Air Force Secretary Frank Kendall took off in an X-62AVISTA at Edwards Air Force Base. Note that during the one-hour flight, all flight actions were completed autonomously by AI! Kendall said - "For the past few decades, we have been thinking about the unlimited potential of autonomous air-to-air combat, but it has always seemed out of reach." However now,

The caching strategy in GolangAPI can improve performance and reduce server load. Commonly used strategies are: LRU, LFU, FIFO and TTL. Optimization techniques include selecting appropriate cache storage, hierarchical caching, invalidation management, and monitoring and tuning. In the practical case, the LRU cache is used to optimize the API for obtaining user information from the database. The data can be quickly retrieved from the cache. Otherwise, the cache can be updated after obtaining it from the database.

70B model, 1000 tokens can be generated in seconds, which translates into nearly 4000 characters! The researchers fine-tuned Llama3 and introduced an acceleration algorithm. Compared with the native version, the speed is 13 times faster! Not only is it fast, its performance on code rewriting tasks even surpasses GPT-4o. This achievement comes from anysphere, the team behind the popular AI programming artifact Cursor, and OpenAI also participated in the investment. You must know that on Groq, a well-known fast inference acceleration framework, the inference speed of 70BLlama3 is only more than 300 tokens per second. With the speed of Cursor, it can be said that it achieves near-instant complete code file editing. Some people call it a good guy, if you put Curs

Last week, amid the internal wave of resignations and external criticism, OpenAI was plagued by internal and external troubles: - The infringement of the widow sister sparked global heated discussions - Employees signing "overlord clauses" were exposed one after another - Netizens listed Ultraman's "seven deadly sins" Rumors refuting: According to leaked information and documents obtained by Vox, OpenAI’s senior leadership, including Altman, was well aware of these equity recovery provisions and signed off on them. In addition, there is a serious and urgent issue facing OpenAI - AI safety. The recent departures of five security-related employees, including two of its most prominent employees, and the dissolution of the "Super Alignment" team have once again put OpenAI's security issues in the spotlight. Fortune magazine reported that OpenA

In PHP development, the caching mechanism improves performance by temporarily storing frequently accessed data in memory or disk, thereby reducing the number of database accesses. Cache types mainly include memory, file and database cache. Caching can be implemented in PHP using built-in functions or third-party libraries, such as cache_get() and Memcache. Common practical applications include caching database query results to optimize query performance and caching page output to speed up rendering. The caching mechanism effectively improves website response speed, enhances user experience and reduces server load.

First you need to set the system language to Simplified Chinese display and restart. Of course, if you have changed the display language to Simplified Chinese before, you can just skip this step. Next, start operating the registry, regedit.exe, directly navigate to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlNlsLanguage in the left navigation bar or the upper address bar, and then modify the InstallLanguage key value and Default key value to 0804 (if you want to change it to English en-us, you need First set the system display language to en-us, restart the system and then change everything to 0409) You must restart the system at this point.

Table of Contents Astar Dapp Staking Principle Staking Revenue Dismantling of Potential Airdrop Projects: AlgemNeurolancheHealthreeAstar Degens DAOVeryLongSwap Staking Strategy & Operation "AstarDapp Staking" has been upgraded to the V3 version at the beginning of this year, and many adjustments have been made to the staking revenue rules. At present, the first staking cycle has ended, and the "voting" sub-cycle of the second staking cycle has just begun. To obtain the "extra reward" benefits, you need to grasp this critical stage (expected to last until June 26, with less than 5 days remaining). I will break down the Astar staking income in detail,
