~~~'Line var :parse  (s-a) ASCII:HT s:tokenize dup !Line ; :word   (-s)  #0 script:get-argument ; :match? (a-f) #0 a:fetch word s:eq? ; :fields (-ss) @Line [ #2 a:fetch ] [ #1 a:fetch ] bi ; :display (-)  fields s:put $: c:put s:put nl ; 'tags [ &Heap [ parse match? [ display ] if ] v:preserve ] file:for-each-line ~~~