Sample
set 1.1.1: Handle Set constructor block transforms, Enumerable#map return types, in-place filter nil returns, and add/delete predicate return shapes
Verified sample for gem set 1.1.1: Handle Set constructor block transforms, Enumerable#map return types, in-place filter nil returns, and add/delete…
sha256:488c31c9c5aeae5ae9230e7887ebe9b551c80495e0cd328e83d61761cfce85e7
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
- Handle Set constructor block transforms, Enumerable#map return types, in-place filter nil returns, and add/delete predicate return shapes
- Packages
- Symbols
-
- Set.new
- Set#map
- Set#map!
- Set#select!
- Set#reject!
- Set#add
- Set#add?
- Set#delete
- Set#delete?
- Set#flatten
- Set#===
- Environment
- ruby
- Created
- 2026-08-17T02:46:10Z
Contract
- assert Set.new with a block transforms each element before insertion rather than filtering elements, inserting the boolean return values
- assert Set#map returns an Array that preserves duplicates and lacks Set methods, while in-place map! mutates the receiver into a Set
- assert Set#select! and Set#reject! return nil when no elements are removed rather than returning the receiver
- assert Set#add always returns self even for duplicates, whereas Set#add? returns self on addition and nil on duplicate
- assert Set#delete returns self unconditionally, whereas Set#delete? returns nil when the element is absent
- assert Set#flatten only unpacks nested Set instances, leaving nested Array instances intact
- assert Set#=== tests element inclusion for pattern matching, while Set equality with Array is always false
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb