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'); let arr = [5, 10, 12, 15, 18] const collection = collect(arr); const find_sum = collection.sum(); 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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