47 lines
1.1 KiB
Markdown
47 lines
1.1 KiB
Markdown
# `firstOrFail()`
|
|
|
|
The firstOrFail method returns the first element in the collection, or throws an error if there are no elements:
|
|
|
|
```js
|
|
collect([1, 2, 3, 4]).firstOrFail(item => item > 1);
|
|
|
|
// 2
|
|
```
|
|
|
|
```js
|
|
collect([1, 2, 3, 4]).firstOrFail(item => item > 4);
|
|
|
|
// Error ('Item not found.') is thrown.
|
|
```
|
|
|
|
You may also call the firstOrFail method with no arguments to get the first element in the collection. If the collection is empty, an error is thrown:
|
|
|
|
```js
|
|
collect([1, 2, 3, 4]).firstOrFail();
|
|
|
|
// 1
|
|
```
|
|
|
|
```js
|
|
collect().firstOrFail();
|
|
|
|
// Error ('Item not found.') is thrown.
|
|
```
|
|
|
|
Like the where method, you may also pass an attribute, operator, and value:
|
|
|
|
```js
|
|
const collection = collect([
|
|
{ product: 'Desk', price: 200, discounted: true },
|
|
{ product: 'Chair', price: 100, discounted: true },
|
|
{ product: 'Bookcase', price: 150, discounted: true },
|
|
{ product: 'Door', price: 100 },
|
|
]);
|
|
|
|
collection.firstOrFail('product', '=', 'Desk');
|
|
|
|
// { product: 'Desk', price: 200, discounted: true }
|
|
```
|
|
|
|
[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/firstOrFail.js)
|