f2e5e26af3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
20 lines
576 B
Markdown
20 lines
576 B
Markdown
### lowercaseKeys
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Creates a new object from the specified object, where all the keys are in lowercase.
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Use `Object.keys()` and `Array.prototype.reduce()` to create a new object from the specified object.
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Convert each key in the original object to lowercase, using `String.toLowerCase()`.
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```js
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const lowercaseKeys = obj =>
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Object.keys(obj).reduce((acc, key) => {
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acc[key.toLowerCase()] = obj[key];
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return acc;
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}, {});
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```
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```js
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const myObj = { Name: 'Adam', sUrnAME: 'Smith' };
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const myObjLower = lowercaseKeys(myObj); // {name: 'Adam', surname: 'Smith'};
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```
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