Regex syntax: Difference between revisions
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Line 9:
! sed (GNU)
! vim
! less (GNU)
! python
|+
Line 15 ⟶ 16:
| <tt>\(</tt> ... <tt>\)</tt>
| <tt>\(</tt> ... <tt>\)</tt>
| <tt>(</tt> ... <tt>)</tt>
| <tt>(</tt> ... <tt>)</tt>
|+
Line 21 ⟶ 23:
| <tt><nowiki>\|</nowiki></tt>
| <tt><nowiki>\|</nowiki></tt>
| <tt><nowiki>|</nowiki></tt>
| <tt><nowiki>|</nowiki></tt>
|+
| word boundary
| <tt>\<</tt> or <tt>\></tt>
| <tt>\<</tt> or <tt>\></tt>
| <tt>\<</tt> or <tt>\></tt>
| <tt>\<</tt> or <tt>\></tt>
| <tt>\b</tt>
|+
| zero or one
| <tt>\?</tt>
| <tt>\?</tt>
| <tt>\?</tt>
| <tt>?</tt>
| <tt>?</tt>
|+
| zero or more
| <tt>*</tt>
| <tt>*</tt>
| <tt>*</tt>
Line 39 ⟶ 51:
|
| <tt>\{-}</tt>
| (unknown)
| <tt>*?</tt>
|+
Line 46 ⟶ 59:
| <tt>\+</tt>
| <tt>+</tt>
| <tt>+</tt>
|+
| one or more (non-greedy)
|
|
| <tt>\{-1,}</tt>
| (unknown)
| <tt>+?</tt>
|}
== References ==
* https://www.gnu.org/software/grep/manual/html_node/Regular-Expressions.html
* http://vimregex.com/
* https://docs.python.org/3/library/re.html
[[Category:Programming]]
[[Category:Cheat sheets]]
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Latest revision as of 08:14, 20 May 2020
- This article is currently a stub; it means I'm aware it's short and I probably intend to expand on the subject in the future!
I can never remember which programs use which regex variants, so here's a quick recap sheet.
grep (GNU) | sed (GNU) | vim | less (GNU) | python | |
---|---|---|---|---|---|
capture | \( ... \) | \( ... \) | \( ... \) | ( ... ) | ( ... ) |
option | \| | \| | \| | | | | |
word boundary | \< or \> | \< or \> | \< or \> | \< or \> | \b |
zero or one | \? | \? | \? | ? | ? |
zero or more | * | * | * | * | * |
zero or more (non-greedy) | \{-} | (unknown) | *? | ||
one or more | \+ | \+ | \+ | + | + |
one or more (non-greedy) | \{-1,} | (unknown) | +? |