I'd use the /e modifier to include code into substitution directly:

while (<>) {
    s/ ([XYZA]) ([-+]?) ([0-9.]+)
     /sprintf "%s$2%.3f", $1, $3
     /gex;
    print;
}

[download]

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re: Rounding numbers in a string by choroba
in thread Rounding numbers in a string by fauve

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