Collect.js whereInstanceOf() function
The whereInstanceOf() function is used to filter input with a given class type. In JavaScript, the array is first converted to a collection and then the function is applied to the collection.
Syntax:
data.whereInstanceOf('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 whereInstanceOf() function in collect.js
Example 1: Here in this example, we take a collection and then using the whereInstanceOf() method we have returned filtered collection using the key.
Javascript
const collect = require( 'collect.js' );
const Input = collect([
new Books( 'Pride and prejudice' ),
new Books( 'The Great Gatsby ' ),
new Movies( 'It' ),
]);
const output = Input.whereInstanceOf(Books);
console.log(output.all());
|
Output:
[
new Books('Pride and prejudice'),
new Books('The Great Gatsby'),
]
Example 2: Same thing we have done here as the above example.
Javascript
const collect = require( 'collect.js' );
const Input = collect([
new Year( '1980' ),
new Year( '2020' ),
new Name( 'Mohan' ),
]);
const output = Input.whereInstanceOf(Name);
console.log(output.all());
|
Output:
[
new Name('Mohan'),
]
References: https://collect.js.org/api/whereinstanceof.html
Last Updated :
16 Oct, 2020
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...