Collect.js where() Function
The where() function is used to filter the collection by a given key or value contained within the given array. In JavaScript, the array is first converted to a collection and then the function is applied to the collection.
Syntax:
data.where('key')
Parameters: This function accepts a single parameter as mentioned above and described below:
- Key: This parameter holds the key name that defines the value of that key.
Return value: Return the collection with a key value that was mentioned.
Below examples illustrate the where() function in collect.js:
Example 1: Here in this example, we take a collection and then using the where() method we have returned filtered collection using the key.
Javascript
const collection = collect([
{ Book: 'Let US C' , price: 2000 },
{ Book: 'Begin Python' , price: 1000 },
{ Book: 'Learn the DEV' , price: 1500 },
]);
const filtered = collection.where( 'price' , [1000, 1500]);
filtered.all();
|
Output:
[
{ Book: 'Begin Python', price: 1000 },
{ Book: 'Learn the DEV', price: 1500 }
]
Example 2:
Javascript
const collect = require( 'collect.js' );
const Input = collect([
new Year( '1980' ),
new Year( '2020' ),
new Year( '2025' ),
]);
const output = Input.where( 'Year' ,[2000, 2025]);
console.log(output.all());
|
Output:
[
new Year('2025')
]
Reference: https://collect.js.org/api/where.html
Last Updated :
12 Jan, 2021
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