grrfl.rb

#!/usr/bin/env ruby
t = <<-EOT
#!/usr/bin/env ruby
if 1+1 == 2
  puts "hello world"
end
EOT

# what one liner replaces '.gsub /^\s*/, "' to make this output "win"
s = <<-EOB.gsub /^\s*/, ""
  #!/usr/bin/env ruby
  if 1+1 == 2
    puts "hello world"
  end
  EOB

if t == s 
  puts "win"
else
  puts "lose"
end

s = t.outdent via "gem install outdent" ? :)

(you don't want #!/usr/bin/env ruby automatically converted to #!ruby, right?)

Do you want to remove the indent? ...or change the header? ...or both?

EOB.gsub(/^\s{2}/,'').gsub(/^#!.*ruby/, "#!ruby")

works.

Of course using the gem as David already suggested is better to remove the indent. But that does not solve the puzzle ;) I would shoot for...

EOB.outdent.gsub(/^#!.*ruby/, "#!ruby")

Remove the indent. The #! thing is a red herring

…

On Mon, Mar 28, 2011 at 4:22 PM, tcurdt ***@***.*** wrote: Do you want to remove the indent? ...or change the header? ...or both?    EOB.gsub(/^\s{2}/,'').gsub(/^#!.*ruby/, "#!ruby") works. Of course using the gem as David already suggested is better to remove the indent. But that does not solve the puzzle ;) I would shoot for...    EOB.outdent.gsub(/^#!.*ruby/, "#!ruby") ## Reply to this email directly or view it on GitHub: https://gist.github.com/891050

The #! line was a red herring, nt actually looking to solve that, just outdent!

outdent solves it, but invokoed a monkeypatch based library :-(

@tcurdt -- legal, but weak, relies on the 2 spaces :-)

EOB.split(/^(\s*)/, 2).drop(1).each_slice(2).map { |prefix, text| text.gsub(/^#{prefix}/, '') }.first

A better one:

EOB.scan(/^(\s*)(.*)/m).map { |prefix, text| text.gsub(/^#{prefix}/, '') }.first

And the simplest one I could come up with... It takes advantage of the side-effects of matching regexes (matched groups go into $1, $2, ...):

EOB.gsub(/^(\s*)(.*)/m, '\2').gsub(/^#{$1}/, '')

+1 for martint's last version

what a weird problem though :)

Impressive!