https://logicwiki.co.uk/index.php?action=history&feed=atom&title=Regular_ExpressionsRegular Expressions - Revision history2026-04-29T09:49:38ZRevision history for this page on the wikiMediaWiki 1.26.2https://logicwiki.co.uk/index.php?title=Regular_Expressions&diff=455&oldid=prevDt1nh6: 1 revision imported2016-05-09T13:27:36Z<p>1 revision imported</p>
<table class='diff diff-contentalign-left'>
<tr style='vertical-align: top;' lang='en'>
<td colspan='1' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='1' style="background-color: white; color:black; text-align: center;">Revision as of 13:27, 9 May 2016</td>
</tr><tr><td colspan='2' style='text-align: center;' lang='en'><div class="mw-diff-empty">(No difference)</div>
</td></tr></table>Dt1nh6https://logicwiki.co.uk/index.php?title=Regular_Expressions&diff=454&oldid=prevMacrop at 14:12, 26 October 20152015-10-26T14:12:58Z<p></p>
<p><b>New page</b></p><div>[[Category:RegEx]]<br />
[[Category:Extreme Programming]]<br />
[[Category:Standards]]<br />
<br />
== Some Examples == <br />
<pre><br />
^ : beginning of a line <br />
<br />
$ : end of a line <br />
<br />
|A : start of a string <br />
<br />
|Z : end of a string <br />
<br />
. : any character<br />
<br />
\w : any letter, digit or underscore<br />
<br />
\W : anything that doesn't match \w <br />
<br />
\d : any digit<br />
<br />
\D : anything not digit<br />
<br />
\s : whitespace (space, tab, newline, ...)<br />
<br />
\S : non whitespace <br />
<br />
* : match zero or more occurances of preceding character and match as many as possible<br />
<br />
? : 0 or 1 repetions<br />
<br />
* : 0 or more repetions<br />
<br />
{n} : \d{1,5} one to 5 chars of decimal<br />
<br />
[ ] :Calend[ae]r [a-z] -> a to z [0-9] -> 0 to 9 [A-Fa-t0-4] -> A to F or a to t or 0 to 4]<br />
<br />
'(Jennifer|Jen|Jenny)\b\w+\b' -> any Jennifer with a surname <br />
<br />
'Je(nnifer|nny\n){1,6}\b\w+\b'<br />
<br />
<br />
</pre><br />
<br />
== Regex in Ruby == <br />
/[aeiou]/ : list of characters<br />
<br />
/[A-Z]/ : capital letters<br />
=== String#match ===<br />
The String#match method converts a pattern to a Regexp (if it isn‘t already one), and then invokes its match method on the target String object. Here is how you find the characters from a String which are next to a whitespace:<br />
'RubyMonk Is Pretty Brilliant'.match(/ ./)</div>Macrop