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POUsing regex to find a pattern which does not start with a certain String
 

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  1. POUsing regex to find a pattern which does not start with a certain String
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    <p>I need to regex-match numbers in a certain pattern which works already, but only if there is not <code>(+</code> right in front of it.</p> <p>Example Strings I want to have a valid match within: <code>12</code>, <code>12.5</code>, <code>200/300</code>, <code>200/300/400%</code>, <code>1/2/3/4/5/6/7</code></p> <p>Example Strings I want to have no valid match within: <code>(+10% juice)</code>, <code>(+4)</code></p> <p>I can already get all the valid matches with <code>(\d+[/%.]?)+</code>, but I need help to exclude the example Strings I want to have no valid match in (which means, only match if there is NOT the String <code>(+</code> right in front of the mentioned pattern).</p> <p>Can someone help me out? I have already experimented with the <code>!</code> (like <code>?!(\(\+)(\d+[/%.]?)+</code>) but for some reason I can't it to work the way I need it.</p> <p>(You can use <a href="http://gskinner.com/RegExr/" rel="nofollow">http://gskinner.com/RegExr/</a> to test regex live)</p> <p>EDIT: I did maybe use wrong words. I don't want to check if the searchstring does start with <code>(+</code> but I want to make sure that there is no <code>(+</code> right in front of my String.</p> <p>Try regexr with the following inputs:</p> <p>Match: <code>(\d+[/%.]?)+</code></p> <p>Check the checkbox for <code>global</code> (to search for more than one match within the text)</p> <p>Text:</p> <pre><code>this should find a match: 200/300/400 this shouldnt find any match at all: (+100%) this should find a match: 40/50/60% this should find a match: 175 </code></pre> <p>Currently it will find a match in all 4 lines. I want a regex that does no longer find a match in line 2.</p>
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    1. COTry `^(\d[/%.]?)+`, i.e. "match only strings that start with a number", so it will work for the examples you provided, but will not be able to extract those patterns from a longer string (which you didn't ask for anyway).
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    2. COAre you interested in other possibilities, like `+100` returning `100` as a match? Every answer so far seems to think that you only want to disregard numbers occurring after `+`.
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