Hash with arrays - get array element

Question

I get hash that contains user role, controller name and list of the controller actions this role can access to.

access = {
    'admin' => [ 'users'    => ['edit','delete'],
                 'messages' => ['show','update']
               ],
     'user' => [ 'index'    => ['index','sign-out'],
                 'messages' => ['show','index']
               ]
}

How can i check what access['admin']['users']['edit'] exists?

mu is too short · Accepted Answer · 2011-06-26 19:52:05Z

5

access['admin']['users'].include? 'edit'

However, this may be a problem: you're using ... => ['users'=>['edit','delete'],...] This will create an array with a hash inside. Example:

{'a'=>'b'} #=> {"a"=>"b"}
['a'=>'b'] #=> [{"a"=>"b"}]

So consider using this:

access = {
    'admin' => { 'users'    => ['edit','delete'],
                 'messages' => ['show','update']
               },
     'user' => { 'index'    => ['index','sign-out'],
                 'messages' => ['show','index']
               }
}

edited Jun 26, 2011 at 19:52

mu is too short

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answered Jun 26, 2011 at 19:02

jtbandes

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5 Comments

Vladimir Tsukanov Over a year ago

@jtbandes thank you for reply, it's exact what i need) But access['admin']['users'].contains? 'edit'. says no method exists. I replace it with access['admin']['users'].grep(/edit/).size >0 Maybe exists more elegant way?

jtbandes Over a year ago

@Vladimir Tsukanov: Glad I could help! If this answered your question, you can click the checkmark on the left, to mark it as answered. Thanks :)

Vladimir Tsukanov Over a year ago

@jtbandes I edited my previous comment. Maybe you know the answer

mu is too short Over a year ago

@Valdimir: Use include? instead of contains? and don't forget to add the missing comma between the 'admin' and 'user' hashes inside access.

jtbandes Over a year ago

Ah my mistake, the method is indeed called include? and not contains?.

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