Looping over input fields as array

Question

Is it possible to do something like this:

$ cat foo.txt
1 2 3 4
foo bar baz
hello world
$ awk \'{ for(i in $){ print $[i]; } }\' foo.txt
1
2
3
4
foo
bar
baz
         


        

Answer 1

I'd use sed:

sed 's/\ /\n/g' foo.txt