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21 lines
1020 B
21 lines
1020 B
11 years ago
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# Get a Version of an Object with Sorted Keys
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Although objects in JavaScript are theoretically unsorted, in practice most engines use insertion order—at least, ignoring numeric keys. This manifests itself most prominently when dealing with an object's JSON serialization.
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So, for example, you might be trying to serialize some object to a JSON file. But every time you write it, it ends up being output in a different order, depending on how you created it in the first place! This makes for some ugly diffs.
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**sorted-object** gives you the answer. Just use this package to create a version of your object with its keys sorted before serializing, and you'll get a consistent order every time.
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```js
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var sortedObject = require("sorted-object");
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var objectToSerialize = generateStuffNondeterministically();
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// Before:
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fs.writeFileSync("dest.json", JSON.stringify(objectToSerialize));
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// After:
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var sortedVersion = sortedObject(objectToSerialize);
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fs.writeFileSync("dest.json", JSON.stringify(sortedVersion));
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```
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