module Sprockets::Utils

def hash_reassoc(hash, *keys, &block)

Returns duplicated frozen Hash.

end
paths << "/usr/local/bin"
new_config = hash_reassoc(config, :paths) do |paths|
config = {paths: ["/bin", "/sbin"]}.freeze

Examples

block - Receives current value at key.
key - Object keys. Use multiple keys for nested hashes.
hash - Hash

Similar to Hash#store for nested frozen hashes.

Internal: Duplicate and store key/value on new frozen hash. 
def hash_reassoc(hash, *keys, &block)
  if keys.size == 1
    hash_reassoc1(hash, keys[0], &block)
  else
    hash_reassoc1(hash, keys[0]) do |value|
      hash_reassoc(value, *keys[1..-1], &block)
    end
  end
end