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Alex Rivera
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I'm trying to write a regex function that will identify and replace a single instance of a match within a string without affecting the other instances. For example, I have this string: 12||34||56 I want to replace the second set of pipes with ampersands to get this string: 12||34&&56 The regex function needs to be able to handle x amount of pipes and allow me to replace the nth set of pipes, so I could use the same function to make these replacements: 23||45||45||56||67 -> 23&&45||45||56||67 23||34||98||87 -> 23||34||98&&87 I know that I could just split/replace/concat the string at the pipes, and I also know that I can match on /\|\|/ and iterate through the resulting array, but I'm interested to know if it's possible to write a single expression that can do this. Note that this would be for Javascript, so it's possible to generate a regex at runtime using eval() , but it's not possible to use any Perl-specific regex instructions.
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