Found the way to delete duplicates on an array (using hash keys), but the other problem is:
if I have linse on a file that say:
username:password
sometx:uilokj
how do i delete the lines that don't have, say, 6 letters, followed by a :
and then another 6 letters.
tried this re, but it won't work:
/\w{6}:\w{6}/
Thanks
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