Get nested values from a hash using single string

Question

I have a string that represents a sequence of keys in a nested hash in the following format:

keys = 'key1[key2]'

and a nested hash that has the corresponding keys like the following:

hash = {key1: {key2: 'value'}}

Is there any way to get the value from this hash directly as in the following?

value = hash[keys]

Or, do I have to write my own logic?

Can you give an example for 3-level nesting? Will it be 'key1[key2][key3]' or 'key1[key2[key3]]'? — Jagdeep Singh
– Jagdeep Singh, Commented Oct 31, 2018 at 8:06

ndnenkov · Accepted Answer · 2018-10-31 08:42:58Z

3

hash.dig(*keys.delete(']').split('[').map(&:to_sym))

answered Oct 31, 2018 at 8:42

ndnenkov

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Comments

Jagdeep Singh · Accepted Answer · 2018-10-31 08:04:52Z

0

To answer your specific question, No, there is no way (to my knowledge) to get the value from hash directly by passing your input string.

You will have to write your own logic to extract the keys from string and then fetch the value.

answered Oct 31, 2018 at 8:04

Jagdeep Singh

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