Question

I am stuck on the last step and hope someone could help me out.

I have 2 files:

file1 =

Green Apple

file2 =

Green Apple/quantity/100

Red Peach/quantity/200

My code:

grep -f file1 file2 | sed ‘s/quantity(.*)/totalXYZ/’

= Green Apple/totalXYZ

I would like to apply it to file2 so the result would look like this:

file2 =

Green Apple/totalXYZ

Red Peach/quantity/200

Thanks

Answer 1

You can get it using AWK this way:

awk -f grepandreplace.awk file2 file1

The code of “grepandreplace.awk” is:

#!/usr/bin/awk -f
BEGIN {
    FS = "/";
    f_grep = ARGV[2];
    ARGC = 2;

    while ((getline < f_grep) > 0) {
        grep[$1] = "";
    }
}

{
    if ($1 in grep) {
        print $1"/totalXYZ";
    } else {
        print $0;
    }
}

And I got your desired output:

Green Apple/totalXYZ
Red Peach/quantity/200

Any questions? leave me a comment.