26 lines
596 B
Markdown
26 lines
596 B
Markdown
---
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title: Uppercase object keys
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type: snippet
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tags: [object]
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author: chalarangelo
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cover: sofia-tram
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dateModified: 2023-02-11T05:00:00-04:00
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---
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Converts all the keys of an object to upper case.
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- Use `Object.keys()` to get an array of the object's keys.
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- Use `Array.prototype.reduce()` to map the array to an object, using `String.prototype.toUpperCase()` to uppercase the keys.
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```js
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const upperize = obj =>
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Object.keys(obj).reduce((acc, k) => {
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acc[k.toUpperCase()] = obj[k];
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return acc;
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}, {});
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```
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```js
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upperize({ Name: 'John', Age: 22 }); // { NAME: 'John', AGE: 22 }
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```
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