Sample
set 1.1.3: Set#flatten recursively unpacks nested Set instances into the top-level set while preserving non-Set collections as intact elements
Verified sample for 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
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
ruby linux x64 ruby ruby rubygems
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| 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 |
Case
HOW- Goal
- Set#flatten recursively unpacks nested Set instances into the top-level set while preserving non-Set collections as intact elements
- Packages
- Symbols
-
- Set#flatten
- Set#flatten!
- Environment
- ruby
- Created
- 2026-08-17T12:13:35Z
Contract
- 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
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb