サンプル

set 1.1.3: Set#flatten recursively unpacks nested Set instances into the top-level set while preserving non-Set collections as intact elements

検証済みサンプル — gem set 1.1.3: Set#flatten recursively unpacks nested Set instances into the top-level set while preserving non-Set collections as intact…

sha256:54ab1158384c2351a783a03781bb32a64f2c9090e053f7de93fdf04e229c9b06

MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

宣言された環境 ruby linux x64 ruby ruby rubygems

環境	コントラクト	ステージ	実行日
ruby 3 · linux debian/x64 · docker ed25519:d91480838ac982c9	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1	2026-08-17
ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1	2026-08-18

HOW

ゴール: Set#flatten recursively unpacks nested Set instances into the top-level set while preserving non-Set collections as intact elements
パッケージ: set 1.1.3
シンボル: Set#flatten
Set#flatten!
環境: ruby
作成日: 2026-08-17T12:13:35Z

Set#flatten recursively merges nested Set instances into the parent set while preserving Array and other non-Set enumerable elements as individual members
Set#flatten returns a new Set instance without mutating the receiver set
Set#flatten! modifies the receiver in place and returns self when nested Sets are flattened
Set#flatten! returns nil and leaves the receiver unchanged when no nested Sets are present, even if nested Arrays exist
Set#flatten eliminates empty nested Set instances during flattening without leaving empty residues
Set#flatten raises ArgumentError with 'tried to flatten recursive Set' when encountering cyclic set references
Set#flatten preserves the receiver's class when invoked on a subclass of Set