JavaScript’s reducer
is one of the most useful array methods in a developer’s arsenal. Introduced in ES5, it’s somewhat similar to the for…each
and map
methods that are used with arrays but improves on their performance and simplicity in specific situations.
The reduce
method executes a callback function that we provide on each element stored in an array and outputs the final value the operation generates. It’s a cleaner way of iterating over and processing the data stored in an array.
Currently, it’s supported by all of the major browser versions and is available in Node.js from version 10.0 upwards.
Today, we are going to explore the reduce
method. We’ll go through how and when you should use reducer
in different scenarios.
Let’s get started then!
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