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    <p><a href="https://www.google.com/search?q=ruby+string+succ+JavaScript" rel="nofollow">A google search for "Ruby string succ Javascript"</a> returns <a href="https://gist.github.com/devongovett/1081265" rel="nofollow">this gist from Devon Govett called "An implementation of Ruby's string.succ method in JavaScript"</a> which appears to be what you're after...</p> <pre><code>/* * An implementation of Ruby's string.succ method. * By Devon Govett * * Returns the successor to str. The successor is calculated by incrementing characters starting * from the rightmost alphanumeric (or the rightmost character if there are no alphanumerics) in the * string. Incrementing a digit always results in another digit, and incrementing a letter results in * another letter of the same case. * * If the increment generates a carry, the character to the left of it is incremented. This * process repeats until there is no carry, adding an additional character if necessary. * * succ("abcd") == "abce" * succ("THX1138") == "THX1139" * succ("&lt;&lt;koala&gt;&gt;") == "&lt;&lt;koalb&gt;&gt;" * succ("1999zzz") == "2000aaa" * succ("ZZZ9999") == "AAAA0000" */ function succ(input) { var alphabet = 'abcdefghijklmnopqrstuvwxyz', length = alphabet.length, result = input, i = input.length; while(i &gt;= 0) { var last = input.charAt(--i), next = '', carry = false; if (isNaN(last)) { index = alphabet.indexOf(last.toLowerCase()); if (index === -1) { next = last; carry = true; } else { var isUpperCase = last === last.toUpperCase(); next = alphabet.charAt((index + 1) % length); if (isUpperCase) { next = next.toUpperCase(); } carry = index + 1 &gt;= length; if (carry &amp;&amp; i === 0) { var added = isUpperCase ? 'A' : 'a'; result = added + next + result.slice(1); break; } } } else { next = +last + 1; if(next &gt; 9) { next = 0; carry = true } if (carry &amp;&amp; i === 0) { result = '1' + next + result.slice(1); break; } } result = result.slice(0, i) + next + result.slice(i + 1); if (!carry) { break; } } return result; } </code></pre>
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    1. POHow to do string increment in Javascript(Node.js)?
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    1. COhttp://meta.stackexchange.com/a/15660 and http://meta.stackexchange.com/a/8259.
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      1. USJonathan Lonowski
    2. CO@JonathanLonowski Agreed on the lmgtfy, which is why I don't point there, but is linking to the specific keywords on google so they can read further also considered rude? I didn't think so. As for the "link only" point, yep, fair enough, I was on my phone and didn't get around to posting the entire content of the gist.
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    3. CO@JonathanLonowski And I will admit, I'm not as active on meta as I should be, and have been away for a while, only just getting back into answering.
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