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Removing Unwanted characters from a text file.

I figure this is a simple regex recipe, but I haven't been able to find the right one yet. I have a text file, and I want to remove all instances of 1-2 digits separated by a colon followed by 1-2 digits. So anything that looks like:

1 Solution
Terry WoodsIT GuruCommented:
Something like this? Don't forget to back up your file before testing, though the -i.bak option should make a backup with a .bak extension.

perl -i.bak -pe 's/(?<!\d)\d\d?:\d\d?(?!\d)//g' my_input_file.txt

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