s{(?<=[a-z])([0-9]{1,3})(?=[.])}{
    sprintf "%04d", $1
}ge;

[download]

...with whatever additions are needed near the start and end of that regex in order to only match the parts that you want to.

- tye        

In reply to Re: RE question; how to insert a digit between const[a-z]*3 && inc[0-9]*3? (sprintf) by tye
in thread RE question; how to insert a digit between const[a-z]*3 && inc[0-9]*3? by taint

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