示例

defaultsDeep mutates target in-place, merges arrays by index, and only fills undefined properties while preserving null and falsy values; get returns default values only on undefined; set creates arrays for numeric path segments.

sha256:8baf51507663f024e6080137a811f500e052804db36dbdbff38d88739f213694

案例

目标

defaultsDeep mutates target in-place, merges arrays by index, and only fills undefined properties while preserving null and falsy values; get returns default values only on undefined; set creates arrays for numeric path segments. HOW

包

lodash-es 4.18.1

环境

node

创建时间

2026-08-17T20:19:38Z

常见的想当然

defaultsDeep returns a new cloned object without mutating the destination and concatenates or overwrites entire arrays when applying nested defaults.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• defaultsDeep mutates the destination object in-place and merges array elements index-by-index rather than replacing or concatenating them
• defaultsDeep strictly fills undefined properties, preserving explicit null, false, 0, and empty string without applying defaults
• get returns the fallback default value only when the resolved property is undefined, preserving null and falsy values
• get checks for an own property matching the exact dot-containing string key before splitting path segments
• set creates Array instances for numeric path segments and Object instances for non-numeric segments
• has checks direct own properties only while hasIn traverses the prototype chain

文件

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

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9