how to format the output of a cat expression

Question

I have a file in this format:

event: event1
event: event2
event: event2
event: event3

With this command:

cat event.txt |  cut -d : -f2 |sort |uniq -c |sort -n

I get this result:

1 event1
1 event3
2 event2

I would like to have instead an output like that:

event1 1
event2 2
event3 1

Do you have any idea of a way to do that?

Answer 1

If you want your output to be sorted by eventID like event[1] event[2] ... just take fedorqui's solution.

If you want your output to keep the original order of col2 in input file:

awk -F': *' 'NR==FNR{c[$2]++;next}$2 in c{print $2,c[$2];delete c[$2]}' file file

an example:

kent$  cat f
event: event1
event: event2
event: event2
event: event4
event: event4
event: event3

kent$  awk -F': *' 'NR==FNR{c[$2]++;next}$2 in c{print $2,c[$2];delete c[$2]}' f f 
event1 1
event2 2
event4 2
event3 1