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Full Discussion: Find all lines in file such that each word on that line appears in at least n lines of the file
Top Forums Shell Programming and Scripting Find all lines in file such that each word on that line appears in at least n lines of the file Post 302999278 by uncleMonty on Friday 16th of June 2017 10:12:57 AM
Old 06-16-2017
Yes, thanks for the description. And I've learned that the loop through the file the first time to build the array of counters is kept separate from the second loop that prints the line, via the `NR==FNR` trick that I read a good account of in the "two-file processing" section of this webpage: [EDIT: I thought I posted this yesterday but apparently I don't have enough "juice" to give a url on this forum. But the helpful webpage I was just consulting can be found on the backreference.org site with the title "idiomatic awk".]
 

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LEARN ABOUT PLAN9

yesterday

YESTERDAY(1)						      General Commands Manual						      YESTERDAY(1)

NAME

       yesterday - print file names from the dump

SYNOPSIS

       yesterday [ -c ] [ -date ] files ...

DESCRIPTION

       Yesterday prints the names of the files from the most recent dump.  Since dumps are done early in the morning, yesterday's files are really
       in today's dump.  For example, if today is March 17, 1992,

	      yesterday /adm/users

       prints

	      /n/dump/1992/0317/adm/users

       In fact, the implementation is to select the most recent dump in the current year, so the dump selected may not be from today.

       With option -c, yesterday copies the dump file to the current directory.

       The date option selects other day's dumps, with a format of 2, 4, 6, or 8 digits of the form dd, mmdd, yymmdd, or yyyymmdd.

       Yesterday does not guarantee that the string it prints represents an existing file.

EXAMPLES

       Back up to yesterday's MIPS binary of vc:

	      cd /mips/bin
	      yesterday -c vc

       Temporarily back up to March 1's MIPS C library to see if a program runs correctly when loaded with it:

	      bind `{yesterday -0301 /mips/lib/libc.a} /mips/lib/libc.a
	      rm v.out
	      mk
	      v.out

FILES

       /n/dump

SOURCE

       /rc/bin/yesterday

SEE ALSO

       fs(4)

BUGS

       It's hard to use this command without singing.

																      YESTERDAY(1)
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