1 USING: byte-arrays checksums checksums.superfast fry kernel math
19 "1234567890" [ length 1 + ] keep 0 <superfast>
20 '[ _ swap head _ checksum-bytes ] map-integers
25 "1234567890" dup >byte-array [
26 [ length 1 + ] keep 0 <superfast>
27 '[ _ swap head _ checksum-bytes ] map-integers