Sha256: 6f4d128f0b44f2c39caccff292b383664d263fa612535b6d36410b4ea90c65fa
Contents?: true
Size: 784 Bytes
Versions: 142
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Stored size: 784 Bytes
Contents
# frozen_string_literal: true
# A decorator for handling a collection of hashes with similar keys.
#
class HashCollection < SimpleDelegator
alias_method :collection, :__getobj__
# Example:
#
# foo = [
# {a: 1, b: 2},
# {b: 3, c: 4}
# ]
#
# bar = HashCollection.new(foo)
# bar.to_a => [[:a, 1, nil], [:b, 2, 3], [:c, nil, 4]]
#
def to_a
keys = find_unique_keys
build_items(keys)
end
private
def find_unique_keys
collection.flat_map(&:keys).uniq
end
def build_items(keys)
keys.each_with_object([]) do |key, memo|
memo << build_item_for_key(key)
end
end
def build_item_for_key(key)
[key] + find_values(key)
end
def find_values(key)
collection.map { |result| result.fetch(key) }
end
end
Version data entries
142 entries across 142 versions & 1 rubygems