Ruby convert array to nested hash

I have the following:

value = 4开发者_JS百科2  
array = ["this","is","a","test"]

how can I convert that to get this

{ "this" => { "is" => { "a" => { "test" => 42 } } } }

the array is always flat.

Thank you!

Try this:

array.reverse.inject(value) { |assigned_value, key| { key => assigned_value } }
#=> {"this"=>{"is"=>{"a"=>{"test"=>42}}}}