Re: sum of counts from unix grep -c

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grep -hc pattern files | perl -lpe '${_{_}}+=+${_}}{${_}+=+${_{_}}'

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cat files | grep -c pattern

    cat files | grep -hc pattern
    grep -hc pattern files

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cat file1 file2 ... | grep -hc pattern

    cat *.h | grep -hc define
    grep -hc define *.h

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