Re: The joy of pipes

In comp.os.linux.misc, John Ames  <commodorejohn@gmail.com> wrote:

Eli the Bearded <*@eli.users.panix.com> wrote:

Okay, I give up.
1. How does that relate to EBCDIC?

(I think it was a topic shift to applications of *nix pipes...?)

Traditional Unix "spell", which merely outputs words not recognized
without context or even line numbers, is an application of pipes.

Roughly like this:

--8<---------------cut here---------------start------------->8---
cat ~/.spell.words /usr/dict/words 2>/dev/null |
  tr A-Z a-z  |
  tr -dc a-z'
  ' |
  grep '[a-z]' |
  SPELLSTEMTOOL |
  sort -u > $TMPFILE_A

< $INPUT_FILE tr -s ' ^I!$&()_+[]{}:l"'\''\.,?/-' '
' |
  tr A-Z a-z  |
  tr -dc a-z'
' |
  grep '[a-z]' |
  sort -u > $TMPFILE_B

comm -13 $TMPFILE_A $TMPFILE_B
--8<---------------cut here---------------end--------------->8---


Where SPELLSTEMTOOL is a heuristic that tries to make "try" into "tries"
and related dictionary fixes to compensate for the words file not having
all the variants. (These days it is /usr/share/dict/words but also
these days traditional spell is hard to find. Gnu spell is different.)

Elijah
------
or maybe the stem tool worked on file B in the other direction