I just wrote my first Ruby script. I'm an experienced C and perl
programmer, so please, if it looks too much like these languages and not
Ruby, let me know. I've got a 100K word list (Linux dictionary) on my
Mac and am opening it then looking for any words that are exactly 10
letters long with no letters repeating ('profligate\n') == 11 is a
match. After I wrote my first version I did some playing. I first saw
that the array class mixed in enumerable and that I could use the to_a
call from there, but a quick check using -r profile showed that my
original call to split was a much quicker way to convert from a string
to an array. I then tried putting the File.open in a block and found
that this was much slower, even if I subtract out the time for the open,
which I assume is an error in how the profile is counting total time.
Here's the faster version:
f = File.open("./words")
begin
while f.gets
if $_.length == 11
ar = $_.split(//)
if ar.uniq! == nil
print "#{ar.to_s}"
end
end
end
rescue EOFError
f.close
end
And here's the slower block version:
File.open("./words") { |f|
while f.gets
if $_.length == 11
ar = $_.split(//)
if ar.uniq! == nil
print "#{ar.to_s}"
end
end
end
}
Again, the words file is just a list of about 100K unique words from the
dict command or similar on *nix....
Any critique welcome and enlightenment is encouraged.
Thanks!
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