CODEWITHSUNDEEP
awkgrep
Sebastian
Sebastian

Reputation: 483

Is it possible to filter and count at the same time in grep?

I have a file with several million lines (Apple's EPF) What I need is to filter this using few search terms, but at the same time I need the number of matched lines to put in last row of output file. I thought of course about two runs - one that filter, and another that counts but that doesn't look like optimal solution because one filter can take few minutes.

for now I am testing something like this:

grep -f filtrowanie application_price_old > appprice_temp
perl -i -pe 's/#recordsWritten\:\d{7,8}/#recordsWritten:`grep -e '^\d' -c 
appprice_temp`/ appprice_temp

Upvotes: 0

Views: 117

Answers (1)

Ed Morton
Ed Morton

Reputation: 203493

Based on the text and code you provided in your question, this is probably what you're looking for:

awk '
    NR==FNR { regexps[$0]; next }
    {
        for (regexp in regexps) {
            if ($0 ~ regexp) {
                print
                cnt++
                next
            }
        }
    }
    END {
        print "#recordsWritten:" cnt+0
    }
' filtrowanie application_price_old > appprice_temp

If that's not what you need then edit your question to clarify your requirements and provide concise, testable sample input and expected output.

Upvotes: 1

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