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iOS CharacterSet(字符集)简单理解

通常我们在一些场景下会用到一个字符串是否包含某种特定字符,比如判断密码是否只包含数字,检查url是否有不规范字符,删除多余空格等操作 CharacterSet简单描述 ---- CharacterSet 下面是简单分组总结: 属性 描述 CharacterSet.alphanumerics 字母和数字的组合,包含大小写, 不包含小数点 CharacterSet.capitalizedLetters 字母 ,首字母大写,Lt类别 CharacterSet.decimalDigits 0-9的数字,也不包含小数点 CharacterSet.whitespaces 空格 CharacterSet.whitespacesAndNewlines 空格和换行 CharacterSet.letters 所有英文字母,包含大小写 65-90 97-122 CharacterSet.lowercaseLetters 小写英文字母 97-122 CharacterSet.uppercaseLetters 大写英文字母 65-90 CharacterSet.nonBaseCharacters 非基础字符 M* CharacterSet.illegalCharacters 不合规字符,没有在Unicode

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phpmyadmin与php.ini中的socket配置问题

GPL), Release 21, Revision 2a37e4e Protocol version: 10 Connection: Localhost via UNIX socket Server characterset : utf8 Db characterset: utf8 Client characterset: utf8 Conn. characterset: utf8 UNIX socket: /var/lib/mysql/mysql.sock Uptime: 26 min 14 sec Threads: 1 Questions : utf8Db     characterset: utf8Client characterset: utf8Conn.   characterset: utf8UNIX socket: /var/lib/mysql/mysql.sockUptime: 26 min 14 sec Threads: 1  Questions

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    如何查看mysql的版本_查看mysql版本语句是什么

    Community Server (GPL) Protocol version: 10 Connection: localhost via TCP/IP Server characterset : latin1 Db characterset: latin1 Client characterset: gbk Conn. characterset: gbk TCP port: 3307 Uptime: 4 hours 7 min 11 sec Threads : latin1 Db characterset: latin1 Client characterset: gbk Conn. characterset: gbk TCP port: 3307 Uptime: 4 hours 9 min 29 sec Threads

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    Mysql查看版本号的五种方式介绍

    5.1.69 Source distribution Protocol version:10 Connection: Localhost via UNIX socket Server characterset :utf8 Db characterset:utf8 Client characterset:utf8 Conn. characterset:utf8 UNIX socket: GPL), Release 5, Revision a2f663a Protocol version: 10 Connection: Localhost via UNIX socket Server characterset : latin1 Db characterset: latin1 Client characterset: utf8 Conn. characterset: utf8 UNIX socket: /var

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    MYSQL回顾(库操作相关)

    8.0.18 Homebrew Protocol version: 10 Connection: Localhost via UNIX socket Server characterset : utf8mb4 Db characterset: utf8mb4 Client characterset: utf8mb4 Conn. characterset: utf8mb4 UNIX socket: /tmp/mysql.sock Uptime: 4 days 20 hours 19 min

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    Oracle show 语句

    Character Set SQL> select * from V$NLS_VALID_VALUES where parameter='CHARACTERSET' and value like ----------------- ---------------------------------------------------------------- ----- ---------- CHARACTERSET AL24UTFFSS TRUE 0 CHARACTERSET UTF8 FALSE 0 CHARACTERSET UTFE FALSE 0 CHARACTERSET AL32UTF8 FALSE 0 CHARACTERSET AL16UTF16 AL16UTF16 NLS_CHARACTERSET WE8MSWIN1252 NLS_ISO_CURRENCY AMERICA

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    Centos 下同时安装 Mysql4 和 Mysql5,二进制方式

    Protocol version:       10 Connection:             Localhost via UNIX socket Server characterset :    latin1 Db     characterset:    latin1 Client characterset:    latin1 Conn.  characterset:    latin1 UNIX socket:            /tmp/mysql.sock Uptime:                 2 :    latin1 Db     characterset:    latin1 Client characterset:    latin1 Conn.  characterset:    latin1 UNIX socket:            /tmp/mysql5.sock Uptime:

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    Percona MySQL查看没有访问的表

    Release 83.0, Revision dc97471bd40 Protocol version:10 Connection:Localhost via UNIX socket Server characterset :utf8 Db     characterset:utf8 Client characterset:utf8 Conn.   characterset:utf8 UNIX socket:/tmp/mysql.sock Uptime:110 days 8 hours 34 min 25 sec Threads: 32  Questions

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    【常用命令】修改数据库字符集(仅供测试使用)

    Keyword: 修改数据库字符集 NLS_CHARACTERSET NLS_NCHAR_CHARACTERSET 正文: 通常来讲,数据库建成后,字符集不允许修改,但是由于测试的目的可能需要修改数据库的字符集 NLS_CALENDAR GREGORIAN NLS_NUMERIC_CHARACTERS ., NLS_NCHAR_CHARACTERSET AL16UTF16 NLS_CHARACTERSET AL32UTF8 NLS_ISO_CURRENCY NLS_CALENDAR GREGORIAN NLS_NUMERIC_CHARACTERS ., NLS_NCHAR_CHARACTERSET AL16UTF16 NLS_CHARACTERSET JA16SJISTILDE★ NLS_ISO_CURRENCY

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    MySQL修改端口号(修改mysql的端口号会有问题吗)

    5.7.26-0ubuntu0.18.04.1 (Ubuntu) Protocol version: 10 Connection: Localhost via UNIX socket Server characterset : latin1 Db characterset: latin1 Client characterset: utf8 Conn. characterset: utf8 UNIX socket: /var/run/mysqld/mysqld.sock Uptime: 3 hours 10 min 3 sec Threads:

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    MySQL 5.7 MGR单主确定主节点方法

    5.7.26-29-log Percona Server (GPL) Protocol version:  10 Connection:    127.0.0.1 via TCP/IP Server characterset :    utf8mb4 Db    characterset:    utf8mb4 Client characterset:    utf8 Conn.  characterset:    utf8 TCP port:      3306 Uptime:        39 days 8 hours 53 min 39 sec Threads: 4

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    iOS UITextField 显示银行卡格式

    self.contentTextField) { // 4位分隔银行卡卡号 NSString *text = [textField text]; NSCharacterSet *characterSet stringByReplacingOccurrencesOfString:@" " withString:@""]; if ([string rangeOfCharacterFromSet:[characterSet MIN(text.length, 4)]; } newString = [newString stringByTrimmingCharactersInSet:[characterSet

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    Oracle的N-数据类型困惑

    谈到N-数据类型,不得不提到国家字符集(National Character Set),国家字符集是用于像NCHAR、NVARCHAR2、NCLOB这种数据类型的,他是由参数NLS_NCHAR_CHARACTERSET 普通的数据库字符集,则用于CHAR、VARCHAR2、LONG和CLOB数据类型的,则是参数NLS_CHARACTERSET控制的。 从9i开始,NLS_NCHAR_CHARACTERSET只能有2个取值,UTF8或者AL16UTF16,默认值是AL16UTF16,如果无特殊需求,推荐用该值。 NCLOB - 存储最多4GB字符串,即使NLS_NCHAR_CHARACTERSET定义为UTF8,在这种数据类型,数据都会按照UCS2或者AL16UTF16进行存储,影响有限,具体可参考Possible The National Character Set(NLS_NCHAR_CHARACTERSET) in Oracle 9i, 10g , 11g and 12c (Doc ID 276914.1)给了一张图

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    传智播客OA项目学习--阶段一(2、框架整合)

    Edition (Commercial) Protocol version: 10 Connection: localhost via TCP/IP Server characterset : utf8 Db characterset: utf8 Client characterset: gbk Conn. characterset: gbk TCP port: 3306 Uptime: 2 hours 5 min 35 sec Threads

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    二维码识别(C#)

    createQRImage(string str) { QrCodeEncodingOptions options = new QrCodeEncodingOptions(); options.CharacterSet create128Image(string str) { QrCodeEncodingOptions options = new QrCodeEncodingOptions(); options.CharacterSet { string str = ""; BarcodeReader reader = new BarcodeReader(); reader.Options.CharacterSet (string str) { QrCodeEncodingOptions options = new QrCodeEncodingOptions(); options.CharacterSet { string str = ""; BarcodeReader reader = new BarcodeReader(); reader.Options.CharacterSet

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    业内盆友来稿:Win10下通过PLSQL Developer连接Oracle19C,中文别名乱码怎么破?

    -----AMERICAN_AMERICA.UTF8也可查看更详细的SQL> select * from nls_database_parameters where PARAMETER like '%CHARACTERSET VALUE-------------------------------------------------------------------------------- -----NLS_NCHAR_CHARACTERSET UTF8NLS_CHARACTERSET

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    字符集问题的初步探讨(三)

    NLS_NCHAR_CHARACTERSET AL16UTF16 NLS_RDBMS_VERSION 9.2.0.4.0 20 rows selected. NLS_NCHAR_CHARACTERSET AL16UTF16 NLS_RDBMS_VERSION 9.2.0.4.0 20 rows selected. 2)查看字符集内容 SQL>SELECT * FROM PROPS$; 3)修改字符集 SQL> update props$ set value$='新字符集' where name='NLS_CHARACTERSET SQL> update props$ set value$='EYGLE' where name='NLS_CHARACTERSET'; 1 row updated. NLS_NCHAR_CHARACTERSET ZHS16GBK NLS_RDBMS_VERSION 8.1.7.1.1 18 rows selected.

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    MySQL Shell的简单介绍(r12笔记第95天)

    5.7.17-log Protocol version: 10 Connection: 127.0.0.1 via TCP/IP Server characterset : latin1 Schema characterset: latin1 Client characterset: latin1 Conn. characterset

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    iOS_Swift_Scanner使用_字符串截取

    age=18") 二、属性 // 初始化时输入的目标字符串,只读 let string: String = scanner.string // 想要跳过的字符串集合 let characters: CharacterSet 11*2.2*3.3*namemoyan&Tqqyycxcttage=18") scanner.charactersToBeSkipped = CharacterSet(charactersIn: "? = scanner.scanCharacters(from: CharacterSet(charactersIn: "moxiaoyan")) print(str2 ?? = scanner.scanUpToCharacters(from: CharacterSet(charactersIn: "eag")) print(str4 ??

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    Oracle 数据库入门之----------------------过滤和排序

    NLS_CHARACTERSET --------------------------------                                                         NLS_NCHAR_CHARACTERSET                                                                                                                      NLS_CHARACTERSET                                                                                                                                      NLS_NCHAR_CHARACTERSET

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