Go to content Go to sidebar

Ruby Follies: do-end not do-done

Technology: 16 Mar 2005, 06:10

As an long time shell hacker, one of the most difficult things about Ruby is remembering that it's do…end not do…done.

in the shell:
for i in *
do
    …
done

in Ruby
while cond do
    …
end

The other thing to remember is that Ruby doesn't have a post-test loop. Combine the begin…end construct with while/until instead:

begin
    …
end while cond

begin
    …
end until cond