Sample
csv 3.3.2: Show that duplicate CSV headers are collapsed differently when a CSV row is converted through CSV::Row#to_h than by a generic Ruby Hash merge.
Verified sample for gem csv 3.3.2: Show that duplicate CSV headers are collapsed differently when a CSV row is converted through CSV::Row#to_h than by a…
sha256:b4414ef0484dcdf82014555dba5031e1df164e93dc8a95ab9187db3918b6b2f0
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
- 1
Declared environment
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-16 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | SKIPPED | compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Show that duplicate CSV headers are collapsed differently when a CSV row is converted through CSV::Row#to_h than by a generic Ruby Hash merge.
- Packages
- Symbols
-
- CSV::Row#to_h
- Environment
- ruby
- Created
- 2026-08-16T15:27:29Z
Contract
- CSV.parse("id,id,name\n1,2,alice\n", headers: true).first.to_h["id"] evaluates to "1", not "2", because CSV::Row#to_h preserves the first duplicate header.
- The same row converted with row.to_a.to_h returns "2" for key "id", showing that ordinary Ruby merge order rules do apply there.
Files
- Gemfile
- NOTES.md
- csx.json
- test/contract.rb