let's say you have
dog, cat, 1, 2, 3
reverse, 7, 9, i, tell, you
you want to print
3, 2, 1, cat, dog
you, tell, i, 9, 7, reverse
The delimiter is a comma. The number of commas in each line though is undetermined.
How would you do this using either regular UNIX or awk? I know the answer can't be that complex, but am having trouble thinking INSIDE the box.
echo dog, cat, 1, 2, 3 |awk '{for(i=NF;i>1;i--) printf $i OFS;print $1}' FS=, OFS=,
3, 2, 1, cat,dog
---------- Post updated at 04:14 AM ---------- Previous update was at 04:09 AM ----------
never mind my previous comment (which I edited). this does appear to work!
$ ruby -F"," -ane '$F[-1].chomp!; $F.reverse!; print "#{$F.join(",")}\n"' file
3, 2, 1, cat,dog
you, tell, i, 9, 7,reverse
Perl & Ruby:
perl -F, -lane'
print join ",", reverse @F
' infile
ruby -F, -lane'
print $F.reverse.join ","
' infile