search for pattern and print lines only if pattern found in more than 1 line

[marksand]

hi,
I'd like to check if pattern occurs in multiple lines in a file and print those lines (if pattern found only once then ignore and don't print the line).
regards, Mark.

 

[feherke]

Hi

The simplest is to collect the matching lines and output them only ad the end if the count condition is met :

[fuchsia]/pattern/[/fuchsia][teal]{[/teal]m[teal][++[/teal]n[teal]]=[/teal][navy]$0[/navy][teal]}[/teal][b]END[/b][teal]{[/teal][b]if[/b][teal]([/teal]n[teal]>[/teal][purple]1[/purple][teal])[/teal][b]for[/b][teal]([/teal][navy]i[/navy][teal]=[/teal][purple]1[/purple][teal];[/teal]i[teal]<=[/teal]n[teal];[/teal]i[teal]++)[/teal][b]print[/b] m[teal][[/teal]i[teal]]}[/teal]

If need to process huge amount of data, then better rewrite it to delay outputting the first match only until the second match is found.

Tested with [tt]gawk[/tt] and [tt]mawk[/tt].


Feherke.
feherke.ga