in reply to Pattern Match/Trim Variables.
"MM/DD/YYYY HH:MM:SS.XXX" and remove ".XXX" that's it. This directly translates to perl:
s{^ ( #capture \d{2} #MM / \d{2} #DD / \d{4} #YYYY \s+ \d{2} #HH : \d{2} #MM : \d{2} #SS ) #stop capturing \. \d{3} #XXX $} {$1}x #replace by captured
Have you read perlrequick and perlre?
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