Text Processingflags: gm

Single-Line Comment (// or #)

Match single-line comments using either the `//` (C-family) or `#` (shell, Python, Ruby, YAML) marker.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
(?://|#).*$   (flags: gm)

Raw source: (?://|#).*$

How it works

(?://|#) is a non-capturing group matching either marker. .*$ matches the rest of the line up to the newline. The g flag finds every comment; the m flag makes $ anchor at line boundaries instead of just end-of-string.

Examples

Input

var x = 1; // assignment\n# python style\ny = 2

Matches

  • // assignment
  • # python style

Input

Just a // sample line

Matches

  • // sample line

Input

no comments here

No match

—

Common use cases

  • •Stripping line comments before evaluation
  • •Linting rules for TODO/FIXME flagging
  • •Documentation extraction (e.g. README from comments)
  • •Cross-language source analysis
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