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published on 2021-11-10 in computing Awk associative arrays rule! file.dat: foo 234 bar 43 baz 109 bar 823 foo 283 baz 23 awk '{a[$1] += $2} END {for (i in a) print i,a[i]}' file.dat output: baz 132 foo 517 bar 866 Now, do this on a file with 100,000 lines
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