The sum() method in collect.js is used to return the sum of all the items in the given collection.
Syntax:
collect(array).sum()
Parameters: The collect() method takes one argument that is converted into the collection and then sum() method is applied on it.
Return Value: This method returns the sum of all items in the collection:
The below examples illustrates the sum() method in collect.js:
Example 1:
Javascript
// Acquiring collect.js constant const collect = require('collect.js');Â Â Â Â Â Â let arr = [5, 10, 12, 15, 18]Â Â Â Â Â Â const collection = collect(arr); Â Â const find_sum = collection.sum();Â Â Â console.log(find_sum); |
Output:
60
Example 2:
Javascript
// Acquiring collect.js constant const collect = require('collect.js');      let obj = [     {         subject: 'English',         score: 85,     },    {         subject: 'math',         score: 90,     },     {         subject: 'science',         score: 98,     } ];     const collection = collect(obj);   const find_sum = collection.sum('score');   console.log(find_sum); |
Output:
273
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