Sha256: 58a466ec9b6bd8debb3e4de253d2f487aa1d35be72fed486d7df079f163fd6a6
Contents?: true
Size: 753 Bytes
Versions: 35
Compression:
Stored size: 753 Bytes
Contents
# 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
35 entries across 35 versions & 1 rubygems