


How to match characters between two occurrences of the same but random string
php小编子墨在这里为大家介绍一种解决方案,即How to match characters between two occurrences of the same but random string。当遇到这种情况时,我们可以利用正则表达式和回溯引用来实现。首先,我们使用正则表达式捕获第一次出现的字符串,并将其存储为一个命名捕获组。然后,我们使用回溯引用来引用这个命名捕获组,并在表达式中匹配第二次出现的相同字符串。通过这种方式,我们可以轻松地匹配到这两次出现的相同字符串之间的字符。这是一个简单而有效的方法,希望能帮助到大家。
问题内容
基本字符串如下所示:
repeatedRandomStr ABCXYZ /an/arbitrary/@#-~/sequence/of_characters=I+WANT+TO+MATCH/repeatedRandomStr/the/rest/of/strings.etc
我对这个基本字符串的了解是:
abcxyz
是恒定的并且始终存在。repeatedrandomstr
是随机的,但它的第一次出现总是在开头和abcxyz
之前
到目前为止,我研究了正则表达式上下文匹配、递归和子例程,但自己无法想出解决方案。
我当前工作的解决方案是首先确定 repeatedrandomstr
与什么:
^(.*)\sabcxyz
然后使用:
repeatedrandomstr\sabcxyz\s(.*)\srepeatedrandomstr
匹配我在 $1
中想要的内容。但这需要两个单独的正则表达式查询。我想知道这是否可以在一次执行中完成。
解决方法
在使用 re2 库的 go 中,除了你的方法之外没有其他方法:继续提取 abcxyz
之前的值,然后使用正则表达式来匹配两个字符串之间的字符串,如 re2 不支持也不会支持反向引用。
如果正则表达式风格可以切换到pcre或兼容,您可以使用
^(.*?)\s+ABCXYZ\s(.*)\1 ^(.*?)\s+ABCXYZ\s(.*?)\1
请参阅正则表达式演示。
详细信息:
-
^
- 字符串开头 -
(.*?)
- 第 1 组:除换行符之外的零个或多个字符尽可能少 -
\s+
- 一个或多个空格 -
abcxyz
- 一些常量字符串 -
\s
- 空格 -
(.*)
- 第 2 组:除换行符之外的尽可能多的零个或多个字符 -
\1
- 与第 1 组中的值相同。
The above is the detailed content of How to match characters between two occurrences of the same but random string. For more information, please follow other related articles on the PHP Chinese website!

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

The article explains how to use the pprof tool for analyzing Go performance, including enabling profiling, collecting data, and identifying common bottlenecks like CPU and memory issues.Character count: 159

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

The article discusses Go's reflect package, used for runtime manipulation of code, beneficial for serialization, generic programming, and more. It warns of performance costs like slower execution and higher memory use, advising judicious use and best

The article discusses using table-driven tests in Go, a method that uses a table of test cases to test functions with multiple inputs and outcomes. It highlights benefits like improved readability, reduced duplication, scalability, consistency, and a

The article discusses managing Go module dependencies via go.mod, covering specification, updates, and conflict resolution. It emphasizes best practices like semantic versioning and regular updates.
