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Contents
# frozen_string_literal: true
class ReeHash::Merge
include Ree::FnDSL
fn :merge
doc(<<~DOC)
Returns a new hash with +first_hash+ and +other_hash+ merged recursively.
h1 = { a: true, b: { c: [1, 2, 3] } }
h2 = { a: false, b: { x: [3, 4, 5] } }
merge(h1, h2, deep: true) # => { a: false, b: { c: [1, 2, 3], x: [3, 4, 5] } }
merge(h1, h2, deep: false) # => { a: false, b: { x: [3, 4, 5] } }
Like with Hash#merge in the standard library, a block can be provided
to merge values:
h1 = { a: 100, b: 200, c: { c1: 100 } }
h2 = { b: 250, c: { c1: 200 } }
merge(h1, h2) { |key, this_val, other_val| this_val + other_val }
=> { a: 100, b: 450, c: { c1: 300 } }
DOC
contract(
Hash,
Hash,
Kwargs[deep: Bool],
Optblock => Hash
)
def call(first_hash, other_hash, deep: true, &block)
recursively_merge(first_hash, other_hash, deep, &block)
end
private
def recursively_merge(first_hash, other_hash, deep, &block)
first_hash.merge(other_hash) do |key, first_val, other_val|
if first_val.is_a?(Hash) && other_val.is_a?(Hash) && deep
recursively_merge(first_val, other_val, deep)
elsif block_given?
yield key, first_val, other_val
else
other_val
end
end
end
end
Version data entries
125 entries across 125 versions & 1 rubygems