Fixed length records: Difference between revisions

=={{header|jq}}==

To read the raw input and write out raw strings, the command-line options -R (raw input), -s ("slurp"), and -r (raw output) options are necessary:

jq -Rrs -f program.jq infile.dat

program.jq:

To take advantage of tail-recursion optimization, we define an inner helper function, `c`, with arity 0:

<lang jq>def cut($n):

def c: if length==0 then empty else .[:$n] , (.[$n:] | c) end;

c;

cut(80) | explode | reverse | implode;</lang>