20 lines
495 B
Markdown
20 lines
495 B
Markdown
---
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title: Array to flags object
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tags: array,object
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expertise: intermediate
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author: chalarangelo
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firstSeen: 2022-04-12T05:00:00-04:00
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---
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Converts an array of strings into an object mapping to true.
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- Use `Array.prototype.reduce()` to convert the array into an object, where each array value is used as a key whose value is set to `true`.
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```js
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const flags = arr => arr.reduce((acc, str) => ({...acc, [str]: true }), {});
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```
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```js
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flags(['red', 'green']); // { red: true, green: true }
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```
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