Collect.js whenNotEmpty() Function
Collect.js is a fluent and convenient wrapper for working with arrays and objects. The whenNotEmpty() function executes the callback function when the collection is not empty.
Installation: Install the Collect.js module using the following command:
npm install --save collect.js
Syntax:
collection.whenNotEmpty(callback)
Parameters: This function takes only one parameter i.e. the callback function which executes if the collection is not empty.
Return Value: This function returns the new collection object.
Example 1: Filename-index.js
Javascript
// Requiring module const collect = require('collect.js') // User defined collection var myCollection = [ 'Good Morning', 'Good Evening', 'Good Afternoon'] // Creating collection object const collection = collect(myCollection); // Function call for single insertion collection.whenNotEmpty(item => item.push('Good Night')); // Printing collection console.log(collection.all()); |
Run the index.js file using the following command:
node index.js
Output:
[ 'Good Morning', 'Good Evening', 'Good Afternoon', 'Good Night' ]
Example 2: Filename-index.js
Javascript
// Requiring module const collect = require('collect.js') // User defined collection var myCollection = ['One', 'Two', 'Three'] // Creating collection object const collection = collect(myCollection); // Function call for multiple insertion collection.whenNotEmpty((item) => { item.push('Four') item.push('Five') item.push('Six') }); // Printing collection console.log(collection.all()); |
Run the index.js file using the following command:
node index.js
Output:
[ 'One', 'Two', 'Three', 'Four', 'Five', 'Six' ]
Reference: https://collect.js.org/api/whenNotEmpty.html
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