16 lines
515 B
Markdown
16 lines
515 B
Markdown
---
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title: truthCheckCollection
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tags: object,logic,array,intermediate
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---
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Checks if the predicate (second argument) is truthy on all elements of a collection (first argument).
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Use `Array.prototype.every()` to check if each passed object has the specified property and if it returns a truthy value.
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```js
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const truthCheckCollection = (collection, pre) => collection.every(obj => obj[pre]);
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```
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```js
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truthCheckCollection([{ user: 'Tinky-Winky', sex: 'male' }, { user: 'Dipsy', sex: 'male' }], 'sex'); // true
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``` |