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keyan/awk_group_by_first_col.sh

Created March 17, 2022 16:17
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awk command to comma-delimited group second column based on value of first column
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awk_group_by_first_col.sh
awk '{if(a[$1])a[$1]=a[$1]", "$2; else a[$1]=$2;}END{for (i in a)print i, a[i];}'
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