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copied!<p>If the number of paths is arbitrary, then you need a two-step approach:</p> <hr> <p><strong>First</strong>, remove all the "uninteresting stuff" from the string. </p> <p>Search for <code>.*?/\d+/([^/]+/?)</code> and replace all with <code>$1</code>.</p> <p>In C#: <code>resultString = Regex.Replace(subjectString, @".*?/\d+/([^/]+/?)", "$1");</code></p> <p>In JavaScript: <code>result = subject.replace(/.*?\/\d+\/([^\/]+\/?)/g, "$1");</code></p> <p>This will transform your string into <code>VOBSWeb/VobsWebUI/VaultWeb/func.js</code>.</p> <hr> <p><strong>Second</strong>, copy the filename to the front of the string.</p> <p>Search for <code>(.*/)([^/]+)$</code> and replace with <code>$2;$1$2</code>.</p> <p>C#: <code>resultString = Regex.Replace(subjectString, "(.*/)([^/]+)$", "$2;$1$2");</code></p> <p>JavaScript: <code>result = subject.replace(/(.*\/)([^\/]+)$/g, "$2;$1$2");</code></p> <p>This will transform the result of the previous operation into <code>func.js;VOBSWeb/VobsWebUI/VaultWeb/func.js</code></p> <hr> <p>If the number of paths is constant, then you can do it in a single regex:</p> <p>Search for <code>^.*?/\d+/([^/]+/).*?/\d+/([^/]+/).*?/\d+/([^/]+/).*?/\d+/([^/]+)</code> </p> <p>and replace with <code>$4;$1$2$3$4</code>.</p> <p>C#: <code>resultString = Regex.Replace(subjectString, @"^.*?/\d+/([^/]+/).*?/\d+/([^/]+/).*?/\d+/([^/]+/).*?/\d+/([^/]+)", "$4;$1$2$3$4");</code></p> <p>JavaScript: <code>result = subject.replace(/^.*?\/\d+\/([^\/]+\/).*?\/\d+\/([^\/]+\/).*?\/\d+\/([^\/]+\/).*?\/\d+\/([^\/]+)/g, "$4;$1$2$3$4");</code></p> <p>This regex will be inefficient if the string fails to match; this could be improved with atomic grouping, but JavaScript doesn't support that.</p>

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