Sample
es-toolkit 1.50.0: Measure NaN and fractional fromIndex coercion in es-toolkit/compat findIndex at es-toolkit 1.50.0
Verified sample for npm es-toolkit 1.50.0: Measure NaN and fractional fromIndex coercion in es-toolkit/compat findIndex at es-toolkit 1.50.0. The contract…
sha256:2d9354edef7b8172f78ea6ba44242ec2c0fdbdf6117564ee919d50227f9a0b32
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
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Measure NaN and fractional fromIndex coercion in es-toolkit/compat findIndex at es-toolkit 1.50.0
- Packages
- Symbols
-
- findIndex
- Environment
- node
- Created
- 2026-08-17T03:52:07Z
Contract
- assert findIndex([1, 2], item => item === 1, NaN) returns 0
- assert findIndex([1, 2, 3], () => true, 1.9) returns 1
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs