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Regular
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101
Regular
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101
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Regular Expression
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^(\S+) (?=(?s:.)*(\1.*)).*
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gm
Test String
New
user1 jul/12/12 user5 jul/13/13 user1 jul/14/12 user1 jul/12/12 user5 jul/13/13 user1 jul/14/12 user3 jan/12/12 user1 jul/12/12 user5 jul/13/13 user1 jul/14/12 user1 jul/12/12 user5 jul/13/13 user1 jul/14/12 user1 jul/12/12 user6 aug/06/06 user5 jul/13/13 user1 jul/14/12 user1 jul/12/12 user5 jul/13/13 user1 jul/14/12 user1 aug/12/12 user5 feb/13/13 user1 dec/14/12 user1 jul/12/12 user5 jul/13/13 user1 jul/14/12 user2 jun/15/14
Substitution
Processing...