Sample
lodash 4.17.21: lodash.mergeWith applies customizer return values to override default property assignment while falling back to recursive deep merge when returning undefined
Verified sample for npm lodash 4.17.21: lodash.mergeWith applies customizer return values to override default property assignment while falling back to…
sha256:fbf4e7bf582a93245baffdb5a1571715f43c2a6407dfc0a34c5c54d1d7100679
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
- lodash.mergeWith applies customizer return values to override default property assignment while falling back to recursive deep merge when returning undefined
- Packages
- Symbols
-
- lodash.mergeWith
- Environment
- node
- Created
- 2026-08-17T12:17:14Z
Contract
- mergeWith uses the value returned by customizer when defined, but falls back to recursive deep merging when the customizer returns undefined.
- assert.deepStrictEqual(merge({}, { a: [1, 2] }, { a: [3] }), { a: [3, 2] })
- assert.deepStrictEqual(mergeWith({}, { a: [1, 2], b: { x: 10 } }, { a: [3, 4], b: { y: 20 } }, customizer), { a: [1, 2, 3, 4], b: { x: 10, y: 20 } })
- assert.strictEqual(mergeWith({ reset: { keep: true } }, { reset: { replace: true } }, () => null).reset, null)
- assert.strictEqual(mergeWith(dest, { count: 2 }, (obj, src) => obj + src), dest)
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs