Given a hash settings, how can you freeze all nested arrays inside it to prevent their modification, while keeping the hash itself mutable?

hard📝 Application Q9 of 15

Ruby - Functional Patterns in Ruby

Given a hash settings, how can you freeze all nested arrays inside it to prevent their modification, while keeping the hash itself mutable?

Asettings.freeze

Bsettings.map(&:freeze)

Csettings.each { |k, v| k.freeze if v.is_a?(Array) }

Dsettings.each_value { |v| v.freeze if v.is_a?(Array) }

Step-by-Step Solution

Solution:

Step 1: Identify nested arrays
Use each_value to iterate over hash values and check if they are arrays.
Step 2: Freeze only arrays
Call freeze on values that are arrays to make them immutable.
Final Answer:
settings.each_value { |v| v.freeze if v.is_a?(Array) } -> Option D
Quick Check:
Freeze nested arrays, keep hash mutable = B [OK]

Quick Trick: Freeze nested arrays selectively with each_value and is_a? [OK]

Common Mistakes:

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