Question

I don’t really know if the title is correct, but the question is quite simple:

I have a value and a key.

The key is as follows:

"one.two.three"

Now, how can I set this hash:

params['one']['two']['three'] = value

Answer 1

You can try to do it with this code:

keys = "one.two.three".split '.' # => ["one", "two", "three"]
params = {}; value = 1; i = 0;  # i is an index of processed keys array element
keys.reduce(params) { |hash, key|
    hash[key] = if (i += 1) == keys.length
      value # assign value to the last key in keys array
    else
      hash[key] || {} # initialize hash if it is not initialized yet (won't loose already initialized hashes)
    end
}
puts params # {"one"=>{"two"=>{"three"=>1}}}