Merging JSON Objects: Deep vs Shallow Merge
Merge JSON objects in JavaScript, Python, and Go: deep merge vs shallow merge, conflict resolution, and lodash/deepmerge alternatives compared.
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Tags: json, developer-tools, transformation
Merging JSON Objects: Deep Merge, Shallow Merge, and Conflicts Merging JSON objects is a fundamental operation in JavaScript applications, configuration management, and API response aggregation. The distinction between shallow and deep merge is the source of more bugs than most developers realize — particularly when merging nested config objects where a later value silently wipes out earlier nested data. Shallow Merge: Object.assign() and Spread Shallow merge copies the top-level properties of one object into another. Properties at deeper levels are not merged — they are replaced wholesale. This is the most common merge bug. The spread operator replaces the entire object with the override's object. It does not recurse into the nested object and merge field by field. has the same shallow…
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