# Newbea question again? **URL:** \ **Category:** Ruby\ **Created:** [March 5, 2008, 5:29am UTC](https://www.ruby-forum.com/t/newbea-question-again/131010 "2008-03-05T05:29:53Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![casid](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/47e85d/32.png) [@casid](https://www.ruby-forum.com/u/casid)\ **Post date:** [March 5, 2008, 5:29am UTC](https://www.ruby-forum.com/t/newbea-question-again/131010/1 "2008-03-05T05:29:53Z")
Hello Ruby Developers, I have tiny problem about comparison. I have a array and hash. I want to compare array elements with hash keys. more details: this is my hash, I create it from yaml file my yaml file template1: template\_of\_roster3: template\_of\_roster2 template\_of\_roster4: template\_of\_roster3 @get\_config=YAML.load(File.open("#{PATH\_IM}/config/converter.yml")) @get\_config == Hash @my\_hash==Hash @enterprises=@get\_config[“template1”] and my array @my\_array=[“template\_of\_roster”,“template\_of\_roster2”,“template\_of\_roster3”] my question here is that how can I compare array with hash keys and how can I can send warning message to user? @my\_array.eql?(@my\_hash.key)==false warn “warning message” something like this. thanks… ---
**Author:** ![casid](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/47e85d/32.png) [@casid](https://www.ruby-forum.com/u/casid)\ **Post date:** [March 5, 2008, 8:27am UTC](https://www.ruby-forum.com/t/newbea-question-again/131010/2 "2008-03-05T08:27:24Z")
On Tue, Mar 4, 2008 at 10:29 PM, Ibrahim D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > can I can send warning message to user? > @my\_array.eql?(@my\_hash.key)==false > warn “warning message” > > something like this. > > thanks… You have a strange structure here. You have values that act as keys. 4 → 3 and 3 → 2. But, if it won’t be circular, and your hashes are truly nested, then, here’s a cowboy recursive hack… @b = false def check h, key h.each { |k, h| @b ||= h.keys.include?(key) || check(h, key) rescue false; @b} end hsh = YAML.load\_file(“your\_file.yml”) puts check(hsh, “template\_of\_roster”) puts check(hsh, “template\_of\_roster3”) =\> false =\> true If your hashes are not nested (i.e. you have one level that you are concerned about), then all you should just use use h[“template1”].keys.include? hth, Todd ---
**Author:** ![casid](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/47e85d/32.png) [@casid](https://www.ruby-forum.com/u/casid)\ **Post date:** [March 5, 2008, 9:53am UTC](https://www.ruby-forum.com/t/newbea-question-again/131010/3 "2008-03-05T09:53:26Z")
> @b = false > def check h, key > h.each { |k, h| @b ||= h.keys.include?(key) || check(h, key) rescue > false; @b} > end > hsh = YAML.load\_file(“your\_file.yml”) > puts check(hsh, “template\_of\_roster”) > puts check(hsh, “template\_of\_roster3”) > =\> false > =\> true > If your hashes are not nested (i.e. you have one level that you are > concerned about), then all you should just use use > h[“template1”].keys.include? > hth, thank you very much… > Todd ---
**Author:** ![casid](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/47e85d/32.png) [@casid](https://www.ruby-forum.com/u/casid)\ **Post date:** [March 5, 2008, 10:46am UTC](https://www.ruby-forum.com/t/newbea-question-again/131010/4 "2008-03-05T10:46:10Z")
On Wed, Mar 5, 2008 at 2:53 AM, Ibrahim D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > thank you very much… > After looking at the documentation, I guess you can simply replace… #keys.include? …with… #has\_key? Todd ---
**Author:** ![casid](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/47e85d/32.png) [@casid](https://www.ruby-forum.com/u/casid)\ **Post date:** [March 6, 2008, 1:46am UTC](https://www.ruby-forum.com/t/newbea-question-again/131010/5 "2008-03-06T01:46:26Z")
Todd B. wrote: > On Wed, Mar 5, 2008 at 2:53 AM, Ibrahim D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > thank you very much… > > After looking at the documentation, I guess you can simply replace… > > #keys.include? > > …with… > > #has\_key? > > Todd thanks again.