RosettaCodeData/Task/Fixed-length-records/J/fixed-length-records-1.j
2023-07-01 13:44:08 -04:00

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_80 ]\ fread 'flr-infile.dat' NB. reads the file into a n by 80 array
_80 |.\ fread 'flr-infile.dat' NB. as above but reverses each 80 byte chunk
'flr-outfile.dat' fwrite~ , _80 |.\ fread 'flr-infile.dat' NB. as above but writes result to file (720 bytes)
processFixLenFile=: fwrite~ [: , _80 |.\ fread NB. represent operation as a verb/function