# Hacking arrays **URL:** \ **Category:** Ruby\ **Created:** [April 29, 2008, 4:11am UTC](https://www.ruby-forum.com/t/hacking-arrays/136120 "2008-04-29T04:11:08Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 4:11am UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/1 "2008-04-29T04:11:08Z")
The code: [http://pastie.caboo.se/188207](http://pastie.caboo.se/188207) The question: Why isn’t it doing them like nested folders? I’d like to get .----------------- | Parent folder | .------------------ | | child folder | | child files | |\_\_\_\_\_\_\_\_\_\_\_\_ * * * but I don’t. Can anyone see whats wrong here? I’m losing my mind. Thanks. ---
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 5:20am UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/2 "2008-04-29T05:20:27Z")
Hi – On Tue, 29 Apr 2008, John wrote: > | .------------------ > | | child folder > | | child files > | |\_\_\_\_\_\_\_\_\_\_\_\_ > > * * * > > but I don’t. Can anyone see whats wrong here? I’m losing my mind. It probably just a matter of counting the divs. I’ve sort of hacked together a rewrite that looks like it’s getting it right. Emphasis on “hacked” 🙂 There’s room for refinement, but anyway, this might get you moving. [http://pastie.org/188490](http://pastie.org/188490) David ---
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 9:17am UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/3 "2008-04-29T09:17:36Z")
On Apr 28, 2008, at 8:10 PM, John wrote: > | .------------------ > | | child folder > | | child files > | |\_\_\_\_\_\_\_\_\_\_\_\_ > > * * * > > but I don’t. Can anyone see whats wrong here? I’m losing my mind. > Thanks. it looks like you are making it much harder than it needs to be… this code gives you the depth you are at all the way down without the need to count: cfp:~ \> find a a a/b a/b/c a/b/c/file.rb a/b/file.rb a/file.rb cfp:~ \> cat a.rb def div folder = ‘.’, depth = 0 title = folder entries = Dir[“#{ folder }/\*”] padding = ’ ’ \* depth files = entries.select{|entry| test ?f, entry} dirs = entries.select{|entry| test ?d, entry} dir\_content = dirs.map do |dir| div dir, depth + 1 end file\_content = files.map do |file| content = \<\<-html #{ file } html end content = \<\<-html #{ title } #{ file\_content } #{ dir\_content } html indent = content[%r/^\s\*/] content.strip.gsub %r/^#{ indent }/, padding end puts div( ARGV.shift ) cfp:~ \> ruby a.rb a a a/file.rb a/b a/b/file.rb ```
a/b/c
a/b/c/file.rb
``` the indentation could be improved… but i suppose that doesn’t matter for html anyhow. regards. a @ [http://codeforpeople.com/](http://codeforpeople.com/) ---
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 9:48pm UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/4 "2008-04-29T21:48:50Z")
The anwser to Phlips question is ‘I don’t know how to write unit tests.’ ---
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 9:24pm UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/5 "2008-04-29T21:24:41Z")
> Where are the unit tests? > > – > Phlip That’s a good question, a fair question, and I would love to anwser it. ---
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 10:04pm UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/6 "2008-04-29T22:04:48Z")
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 John wrote: | The anwser to Phlips question is ‘I don’t know how to write unit | tests.’ | | And I guess you’d like to know how to do that? Well, Ruby ships with Test::Unit [http://ruby-doc.org/core/classes/Test/Unit.html](http://ruby-doc.org/core/classes/Test/Unit.html) Then, there’s Shoulda: [http://www.thoughtbot.com/projects/shoulda](http://www.thoughtbot.com/projects/shoulda) RSpec: > **[RSpec: Behaviour Driven Development for Ruby](http://rspec.info/)** Just to name three options you have. 😉 Ruby on Rails books usually cover Unit Testing (though, Rails brings its own additions to the framework!). And here’s a quick guide to unit testing in Ruby: [http://ruby.about.com/od/learnruby/p/learn\_by\_test.htm?rd=1](http://ruby.about.com/od/learnruby/p/learn_by_test.htm?rd=1) * * * Phillip G. Twitter: [twitter.com/cynicalryan](http://twitter.com/cynicalryan) Zoo: An excellent place to study the habits of human beings. ~ – Evan Esar -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (MingW32) Comment: Using GnuPG with Mozilla - [http://enigmail.mozdev.org](http://enigmail.mozdev.org) iEYEARECAAYFAkgWj4YACgkQbtAgaoJTgL+XGwCfaRgvqP+ALvYgYc8hB58ZMxBL 28YAoI+/nR5jhs9OBcOf26v0uONYpRDL =GJO/ -----END PGP SIGNATURE----- ---
**Author:** ![john\_old](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9f8e36/32.png) [@john\_old](https://www.ruby-forum.com/u/john_old)\ **Post date:** [April 29, 2008, 10:01pm UTC](https://www.ruby-forum.com/t/hacking-arrays/136120/7 "2008-04-29T22:01:15Z")
> It probably just a matter of counting the divs. I’ve sort of hacked > together a rewrite that looks like it’s getting it right. Emphasis on > “hacked” 🙂 There’s room for refinement, but anyway, this might get > you moving.[http://pastie.org/188490](http://pastie.org/188490) > > David That works, perfect. David, thanks. Looks like the num function was the problem. I couldn’t see it - the array intersection wasn’t even part of the equation.