Regex Tuesday Challenge - Week One

This weeks Regex Tuesday challenge, the first challenge, is to make a regex which finds and highlights repeated words in a body of text. It is a fairly easy challenge, and future challenges will usually be trickier.

You should just wrap the repeated word in a <strong> element. For example, this is is a test should be turned into this is <strong>is</strong> a test.

To test a regular expression on the test cases below, type it into the text input. Each test case will be marked as passed or failed respectively - you are aiming to get as many test cases as you can to pass. Note that JavaScript must be enabled for this feature to work. The regex engine used is the JavaScript regex engine; it is similar to PCRE, but with a few differences.

Test cases (0/11) Permalink Hide passing tests

This is a test

This is a test

This is is a test

This is <strong>is</strong> a test

This test test is is

This test <strong>test</strong> is <strong>is</strong>

This test is a test

This test is a test

This this test is a test

This <strong>this</strong> test is a test

cat dog dog cat dog

cat dog <strong>dog</strong> cat dog

This test is a test tester

This test is a test tester

hello world hello world

hello world hello world

This nottest test is something

This nottest test is something

This is IS a test

This is <strong>IS</strong> a test

<Mack> I'll I'll be be back back in in a a bit bit.

<Mack> I'll <strong>I'll</strong> be <strong>be</strong> back <strong>back</strong> in <strong>in</strong> a <strong>a</strong> bit <strong>bit</strong>.