I have an array like:
array = [:a, b: [:c, :d]]
=> [:a, {:b=>[:c, :d]}]
when i was tried array[:b] i got this error:
TypeError (no implicit conversion of Symbol into Integer)
how can I get :b element from this array?
Note: I don't want to use index to do that (array[1]).
Because it is an array (and not a hash) you can get an element by its index. In this example:
array[1]
#=> { :b => [:c, :d] }
Note: I don't want to use index to do that (array[1]).
> array.find{|e| e.is_a?(Hash) && e.has_key?(:b)}
#=> {:b=>[:c, :d]}
or
> array.find{|e| e.has_key?(:b) rescue false}
#=> {:b=>[:c, :d]}
for your specific example:
> Hash[*array][:a][:b]
#=> [:c, :d]
i think this is the solution
array.last[:b]
in this type of array all (key: val) values will store on last element of array as a hash
for example in:
array = [:a, :b, c: [:d], e: [:f], g: [:h]]
=> [:a, :b, {:c=>[:d], :e=>[:f], :g=>[:h]}]
I can access the :c element with:
array.last[:c]
=> [:d]
or
array.select{|x| x.instance_of?(Hash)}.last[:c]
=> [:d]
:bkey?