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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 302999212 by uncleMonty on Thursday 15th of June 2017 09:43:24 AM
Old 06-15-2017
Thank you Rudi. I should learn awk, shouldn't I. That is a good way to count the occurrences. Is there a way, having counted the occurrences, to echo an entire line, if and only if the 1st 3rd 5th and 7th field of that line all appear at least 4 times in the file? (For the smaller sample data I posted, it would find an answer if we searched for lines whose entries all appear at least twice, instead of four times.)

You are correct not to worry about repeats within a single line, this is ruled out by construction of the data.

P.s. apologies if I overreacted--I think what was irritating was not that someone would want to make sure my question wasn't homework (I agree that a forum can quickly become useless to experts if it is overrun by homework questions), but instead the order to "please explain the company you work for and the nature of the problem you are working on", not only because it is intrusive, but because it suggests that only people who work for a company with a work-related problem can legitimately ask for scripting assistance here. But: your forum, your rules, ok.
 

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QUIZ(6) 							   Games Manual 							   QUIZ(6)

NAME
quiz - test your knowledge SYNOPSIS
/usr/games/quiz [ -i file ] [ -t ] [ category1 category2 ] DESCRIPTION
Quiz gives associative knowledge tests on various subjects. It asks items chosen from category1 and expects answers from category2. If no categories are specified, quiz gives instructions and lists the available categories. Quiz tells a correct answer whenever you type a bare newline. At the end of input, upon interrupt, or when questions run out, quiz reports a score and terminates. The -t flag specifies `tutorial' mode, where missed questions are repeated later, and material is gradually introduced as you learn. The -i flag causes the named file to be substituted for the default index file. The lines of these files have the syntax: line = category newline | category `:' line category = alternate | category `|' alternate alternate = empty | alternate primary primary = character | `[' category `]' | option option = `{' category `}' The first category on each line of an index file names an information file. The remaining categories specify the order and contents of the data in each line of the information file. Information files have the same syntax. Backslash `' is used as with sh(1) to quote syntacti- cally significant characters or to insert transparent newlines into a line. When either a question or its answer is empty, quiz will refrain from asking it. FILES
/usr/games/quiz.k/* BUGS
The construct `a|ab' doesn't work in an information file. Use `a{b}'. 7th Edition May 20, 1985 QUIZ(6)
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