"245$a": [
  { "op": "regsub", "from": "foo", "to": "bar", "flags": "g" }
]

[download]

This seems like a good starting point. See neilwatson's article How to ask better questions using Test::More and sample data for the way forward. Once you have a few working test cases defined, the only thing left is to define about a million more, including generous edge and corner cases and exception cases! No problem. :)

Give a man a fish:  <%-{-{-{-<

In reply to Re^3: Regexp substitution using variables by AnomalousMonk
in thread Regexp substitution using variables by MikeTaylor

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