Looking for a bit of regex help. I'd like to design an expression that matches a string with "foo" OR "bar", but not both "foo" AND "bar" If I do something like... <pre class="prettyprint"><code>/((foo)|(bar))/ </code></pre> It'll match "foobar". Not what I'm looking for. So, how can I make regex match only when one term or the other is present? Thanks!

This is what I use: <pre class="prettyprint"><code>/^(foo|bar){1}$/ </code></pre> See: http://www.regular-expressions.info/quickstart.html under repetition

Exclusive Or in Regular Expression

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Looking for a bit of regex help. I'd like to design an expression that matches a string with "foo" OR "bar", but not both "foo" AND "bar"

If I do something like...

/((foo)|(bar))/

It'll match "foobar". Not what I'm looking for. So, how can I make regex match only when one term or the other is present?

Thanks!

937

asked Oct 29 '08 15:10

SocialCensus

1 Answers

This is what I use:

/^(foo|bar){1}$/

See: http://www.regular-expressions.info/quickstart.html under repetition

answered Oct 02 '22 02:10

Tristan

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