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<!DOCTYPE html>
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<head>
<meta charset="utf-8">
<title>Regex Challenge - Week Twelve</title>
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<h1>Regex Tuesday Challenge - Week Twelve</h1>
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<a href="./">« View all Challenges</a>
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<p>This weeks challenge is another slightly easier challenge. In it, you must fix the whitespace in a sentence or paragraph; before, there could be multiple spaces or tabs between two words. You must write a regex such that the final string has one space between words, and two spaces after full stops (hint; there will never be a tab following a full stop). New lines should be left alone.</p>
<p>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.</p>
<p>
<input type="text" id="find" placeholder="/regexp? here/i">
<input type="text" id="replace" placeholder="Replace with">
</p>
<h3>Test cases (<span id='passed-count'>0</span>/12) <a id='permalink' class='button' href='./challenge12.html'>Permalink</a> <label id="hide_passing"><input type="checkbox"> Hide passing tests</label></h3>
<dl id='tests'>
<dt>This is already a valid sentence.</dt><dd>This is already a valid sentence.</dd>
<dt>Extra spaces</dt><dd>Extra spaces</dd>
<dt>Multiple extra spaces</dt><dd>Multiple extra spaces</dd>
<dt>Tab here</dt><dd>Tab here</dd>
<dt>Multiple tabs here</dt><dd>Multiple tabs here</dd>
<dt>Tab and spaces</dt><dd>Tab and spaces</dd>
<dt>Multiple tabs</dt><dd>Multiple tabs</dd>
<dt>Mixed whitespace</dt><dd>Mixed whitespace</dd>
<dt>Sentence. Sentence.</dt><dd>Sentence. Sentence.</dd>
<dt>Sentence with words. Sentence.</dt><dd>Sentence with words. Sentence.</dd>
<dt>The quick brown fox. Jumped.</dt><dd>The quick brown fox. Jumped.</dd>
<dt>There are 1.2 apples</dt><dd>There are 1.2 apples</dd>
</dl>
<div id="congratulations">Congratulations, your regex passes all the test cases! Remember to share this challenge.</div>
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Public domain. Site by <a href="http://macr.ae/">Callum Macrae</a>
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