27 lines
582 B
Markdown
27 lines
582 B
Markdown
---
|
|
title: Truth check collection
|
|
type: snippet
|
|
tags: [object,logic,array]
|
|
cover: digital-nomad-8
|
|
dateModified: 2020-10-22T20:24:44+03:00
|
|
---
|
|
|
|
Checks if the predicate function is truthy for all elements of a collection.
|
|
|
|
- Use `Array.prototype.every()` to check if each passed object has the specified property and if it returns a truthy value.
|
|
|
|
```js
|
|
const truthCheckCollection = (collection, pre) =>
|
|
collection.every(obj => obj[pre]);
|
|
```
|
|
|
|
```js
|
|
truthCheckCollection(
|
|
[
|
|
{ user: 'Tinky-Winky', sex: 'male' },
|
|
{ user: 'Dipsy', sex: 'male' },
|
|
],
|
|
'sex'
|
|
); // true
|
|
```
|