1.1 KiB
1.1 KiB
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Catch Unclosed Parentheses, Brackets, Braces and Quotes |
Catch Unclosed Parentheses, Brackets, Braces and Quotes
The reduce() method reduces an array to a single value. If you're not familiar with it, the following code shows an example of using the the method:
const array1 = [1, 2, 3, 4];
console.log(array1.reduce((accumulator, currentValue) => accumulator + currentValue)); // expected output: 10
You can also define the argument to the reduce method as a variable or constant and hand that in to the function, e.g.,
const array1 = [1, 2, 3, 4];
const reducer = (accumulator, currentValue) => accumulator + currentValue;
// 1 + 2 + 3 + 4
console.log(array1.reduce(reducer)); // expected output: 10
// 5 + 1 + 2 + 3 + 4
console.log(array1.reduce(reducer, 5)); // expected output: 15
You can see and run this code at Array.prototype.reduce().
Solution:
let myArray = [1, 2, 3];
let arraySum = myArray.reduce((previous, current) => previous + current);
console.log(`Sum of array values is: ${arraySum}`);