match

C++11正则表达式 ECMAScript文法

由 不羁岁月 提交于 2020-01-01 12:48:05
突然想写个爬虫，然后发现，如果有正则表达式，会方便些。 C++11提供了Regex类.可以用来完成： 1.Match: 将整个输入拿来比对（匹配）某个正则表达式。 2.Search:查找“与正则表达式吻合”的子序列。 3.Tokenize:正则表达式作为分割器，得到分割器之前的字符串。 4.Replace:将与正则表达式吻合之的子序列替换掉 主要函数有： regex_match(),regex_search(),regex_replace(); 主要对象：sregex_iterator,sregex_token_iterator，regex,smatch 例子: [_[:alpha:]][_[:alnum:]]* 表示，以_或字母开头，后面接着任意个_或字母的组合 [123]?[0-9]\.1?[0-9]\.20[0-9]{2} 表示german format,如 24.12.2010 C++11默认使用 ECMAScript 文法,告诉你怎么构造正则表达式 表示式 意义 . newline以外的任何字符 [...] ...字符中的任何一个 [^...] ...字符之外的任何一个 [ [:charclass:]] 指定字符串类charclass中的一个（见下表） \n,\t,\f,\r,\v 一个newline,tabulator,form feed,carriage return

How to use prefix wildcards like '*abc' with match-against

由 房东的猫 提交于 2019-12-31 01:49:11
问题 I have the following query : SELECT * FROM `user` WHERE MATCH (user_login) AGAINST ('supriya*' IN BOOLEAN MODE) Which outputs all the records starting with 'supriya' . Now I want something that will find all the records ending with e.g. 'abc' . I know that * cannot be preappended and it doesn't work either and I have searched a lot but couldn't find anything regarding this. If I give query the string priya ..it should return all records ending with priya . How do I do this? 回答1: Match doesn't

match with language R for getting the position

由 江枫思渺然 提交于 2019-12-31 01:40:09
问题 I am using match for getting if an element is in a list. For example my list is: c("a","b","h","e"...) and so on if I want to see if element h is in the list I am using match in this way: if ("h" %in% v){do something} How I can get the position of where it finds the element in the list? Thanks 回答1: If you want to know the position use which l <- c("a","b","h","e") which(l=='h') [1] 3 # It'll give you the position, 'h' is the third element of 'l' Note that l is a vector, not a list as you

match with language R for getting the position

由 白昼怎懂夜的黑 提交于 2019-12-31 01:40:06
问题 I am using match for getting if an element is in a list. For example my list is: c("a","b","h","e"...) and so on if I want to see if element h is in the list I am using match in this way: if ("h" %in% v){do something} How I can get the position of where it finds the element in the list? Thanks 回答1: If you want to know the position use which l <- c("a","b","h","e") which(l=='h') [1] 3 # It'll give you the position, 'h' is the third element of 'l' Note that l is a vector, not a list as you

彻底弄懂 Nginx location 匹配

由 送分小仙女□ 提交于 2019-12-30 12:25:08
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Nginx 的 location 实现了对请求的细分处理，有些 URI 返回静态内容，有些分发到后端服务器等，今天来彻底弄懂它的匹配规则 一个最简单的 location 的例子如下 server { server_name website.com; location /admin/ { # The configuration you place here only applies to # http://website.com/admin/ } } 复制代码 location 支持的语法 location [=|~|~*|^~|@] pattern { ... } ，乍一看还挺复杂的，来逐个看一下。 location修饰符类型 「=」 修饰符：要求路径完全匹配 server { server_name website.com; location = /abcd { […] } } 复制代码 http://website.com/abcd 匹配 http://website.com/ABCD 可能会匹配 ，也可以不匹配，取决于操作系统的文件系统是否大小写敏感（case-sensitive）。ps: Mac 默认是大小写不敏感的，git 使用会有大坑。 http://website.com/abcd?param1

Find variables in base Workspace with partial string match (Matlab)

由 时光总嘲笑我的痴心妄想 提交于 2019-12-30 11:06:03
问题 I'd like to know how to find a variable in the base MATLAB Workspace by entering only a part of its name. I have a long list of variables & I don't know the exact variable name. Is there a function that compares/matches character order in a list of variable strings? Thanks, 回答1: You can use who to obtain a list of all variable names currently in your workspace. From there, you can use regexpi to do a case insensitive regular expression lookup to find those variables that match your query.

Find variables in base Workspace with partial string match (Matlab)

由 无人久伴 提交于 2019-12-30 11:05:31
问题 I'd like to know how to find a variable in the base MATLAB Workspace by entering only a part of its name. I have a long list of variables & I don't know the exact variable name. Is there a function that compares/matches character order in a list of variable strings? Thanks, 回答1: You can use who to obtain a list of all variable names currently in your workspace. From there, you can use regexpi to do a case insensitive regular expression lookup to find those variables that match your query.

redis之列表字典操作

由 泪湿孤枕 提交于 2019-12-30 04:21:01
Hash操作 hset(name,key,value) name对应的hash中设置一个键值对(不存在则创建,否则修改) 参数:name,redis中的name key,name对应的hash中的key value,name对应的hash中的value 注:hsetnx(name,key,value) ,当name对应的hash中不存在当前key时则创建 hmset(name,mapping) 在name对应的hash中批量设置键值对 参数:mapping,字典,如:{'k1':'v1','k2':'v2'} hget(name,key) 在name对应的hash中获取根据key获取value hmget(name,keys,*args) 在name对应的hash中获取多个key的值 参数:keys要获取key集合:['k1','k2','k3'] *args,要获取的key,如:k1,k2,k3 hgetall(name) 获取name对应hash的所有键值 hlen(name) 获取name对应的hash中键值对的个数 hkeys(name) 获取name对应的hash中多有的key的值 hvals(name) 获取name对应的hash中所有的value的值 hexists(name,key) 检查name对应的hash是否存在当前传入的key 返回值为数字(存在的个数)

redis总结

由 淺唱寂寞╮ 提交于 2019-12-30 01:27:35
/*--> */ /*--> */ API使用 redis-py 的API的使用可以分类为： 连接方式 连接池 操作 String 操作 Hash 操作 List 操作 Set 操作 Sort Set 操作 管道 发布订阅 一、操作模式 redis-py提供两个类Redis和StrictRedis用于实现Redis的命令，StrictRedis用于实现大部分官方的命令，并使用官方的语法和命令，Redis是StrictRedis的子类，用于向后兼容旧版本的redis-py。 #!/usr/bin/env python # -*- coding:utf-8 -*- import redis r = redis.Redis(host='10.211.55.4', port=6379) r.set('foo', 'Bar') print r.get('foo') View Code 二，连接池 redis-py使用connection pool来管理对一个redis server的所有连接，避免每次建立、释放连接的开销。默认，每个Redis实例都会维护一个自己的连接池。可以直接建立一个连接池，然后作为参数Redis，这样就可以实现多个Redis实例共享一个连接池。 #!/usr/bin/env python # -*- coding:utf-8 -*- import redis pool

javascript regex matching 3 digits and 3 letters

由 五迷三道 提交于 2019-12-30 00:53:07
问题 How to match word in string that contain exactly "3 digits and 3 letters"? e.g. 100BLA var regex = ?; var string = "word word 100BLA word"; desiredString = string .match(regex); 回答1: \d matches a digit [a-zA-Z] matches a letter {3} is the quantifier that matches exactly 3 repetitions ^ Anchor to match the start of the string $ Anchor to match the end of the string So if you use all this new knowledge, you will come to a regex like this: ^\d{3}[a-zA-Z]{3}$ Update: Since the input example has
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