From: 7stud -- <bbxx789_05ss@...>
Date: 2008-05-02T18:32:31+09:00
Subject: Re: Extracting a value from an array

Albert Schlef wrote:
> I have the following array:
> 
> headers = [
>   { :name => 'user-agent', :value => 'blah blah' },
>   { :name =>'content-type', :value => 'text/html' },
>   { :name => 'pragma', :value => 'no-cache' },
>   { :name =>'content-length', :value => '30' },
>   { :name =>'content-type', :value => 'text/html' },
> ]
> 
> Now, I want to extract the :value of the first header of a specific
> :name. For example, I want to extract the :value of the 'content-type'
> header.
> 
> So I do:
> 
> content_length = nil
> headers.each { |header|
>   content_length = header[:value] if header[:name] == 'content-length'
> }
> 
> However, this code is not very "beautiful", and I was wondering if
> there's some other, more clearer way to do this.
> 
> (And it's fine with me if we take the :value of a 'content-type' header
> which is not necessarily the first in the array (in the code above I
> actually pick the last header). Also, I don't very much mind about
> performance because there are a few headers. I'm simply looking for a
> clear, straightforward code for this simple task.)

headers = [
  { :name => 'user-agent', :value => 'blah blah' },
  { :name =>'content-type', :value => 'text/html' },
  { :name => 'pragma', :value => 'no-cache' },
  { :name =>'content-length', :value => '30' },
  { :name =>'content-type', :value => 'text/html' },
]

content_type = ""

headers.each do |hash|
  if hash[:name] == "content-type"
    content_type = hash[:value]
    break
  end
end

puts content_type
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