Beispiel

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.

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Ziel: 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
Pakete: lodash-es 4.18.1
Umgebung: node
Erstellt: 2026-08-16T07:07:40Z

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]])

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