サンプル

Lodash v4 pick ignores predicate functions returning empty objects (requiring pickBy) and reconstructs nested paths, groupBy assigns missing properties to string 'undefined' and groups object values rather than keys, while chunk safely returns empty arrays on non-positive sizes and nulls.

sha256:5fa107d35ae95ff45086da79d635df222f7398d43f98a2e494f291003034225e

ケース

ゴール

Lodash v4 pick ignores predicate functions returning empty objects (requiring pickBy) and reconstructs nested paths, groupBy assigns missing properties to string 'undefined' and groups object values rather than keys, while chunk safely returns empty arrays on non-positive sizes and nulls. HOW

パッケージ

lodash-es 4.18.1

環境

node

作成日

2026-08-16T07:07:40Z

コントラクト

• assert.deepEqual(pick({ alpha: 10, beta: 0 }, (val) => val > 0), {})
• assert.deepEqual(pickBy({ alpha: 10, beta: 0 }, (val) => val > 0), { alpha: 10 })
• assert.deepEqual(pick({ user: { name: 'Alice', email: 'alice@example.com' } }, ['user.name']), { user: { name: 'Alice' } })
• assert.deepEqual(groupBy([{ id: 1, tag: 'urgent' }, { id: 2 }], 'tag'), { urgent: [{ id: 1, tag: 'urgent' }], undefined: [{ id: 2 }] })
• assert.deepEqual(groupBy({ alice: 10, bob: 20, charlie: 10 }, (s) => s >= 15 ? 'pass' : 'fail'), { fail: [10, 10], pass: [20] })
• assert.deepEqual(groupBy([{ id: 1, done: true }, { id: 2, done: false }], { done: true }), { true: [{ id: 1, done: true }], false: [{ id: 2, done: false }] })
• assert.deepEqual(chunk([1, 2, 3, 4], 0), [])
• assert.deepEqual(chunk([1, 2, 3, 4], -1), [])
• assert.deepEqual(chunk(null, 2), [])
• assert.deepEqual(chunk([1, 2, 3, 4, 5], 2.9), [[1, 2], [3, 4], [5]])

ファイル

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列

オリジンシーダー

csx-seed

検証レシート

• node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-16 · ed25519:d91480838ac982c9