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regex

Regular expressions for text patterns

ProgrammingHow to Replace Line Breaks (\r\n, \n) in C# Strings

Learn to replace newlines like \r\n or \n in C# strings using ReplaceLineEndings, Regex.Replace, or chained methods. Handle cross-platform text from files or APIs with code examples and pitfalls.

6 answers• 1 view
ProgrammingHow to Count Char Occurrences in Java String One-Liner

Idiomatic Java ways to count specific characters like dots in strings without loops: streams, replace tricks, regex. Efficient one-liners for 'a.b.c.d' yielding 3, with performance tips and best practices for Java strings.

4 answers• 1 view
ProgrammingFixing UnsupportedOperationException When Removing from Java Lists

Learn why Arrays.asList() throws UnsupportedOperationException and how to properly modify lists in Java with practical solutions.

1 answer• 1 view
WebPreserve URL Parameters in Chrome Extensions declarativeNetRequest Redirects

Learn how to preserve URL parameters with regexSubstitution in Chrome extensions using declarativeNetRequest API. Fix parameter loss in redirects.

1 answer• 1 view
ProgrammingGenerate Regex Patterns from Input-Output Pairs with Code

Generate regex patterns from input-output examples to extract values (e.g., '2457' from 'example/123/2457'). Use online tools, grex, and Python/Java automation.

1 answer• 1 view
ProgrammingCheck if a String Contains a Substring in Bash - Quick Guide

Fast, idiomatic ways to check if a string contains a substring in Bash. Use [[ *substring* ]], case, or =~ for regex. Also covers quoting and portability.

1 answer• 6 views