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Understanding How Reducers are Used in Redux
24.10.2019
A reducer is a function that determines changes to an application’s state. It uses the action it receives to determine this change. We have tools, like Redux, that help manage an application’s state changes in a single store so that they behave consistently.
Why do we mention Redux when talking...
Getting to Know the useReducer React Hook
26.6.2019
useReducer is one of a handful of React hooks that shipped in React 16.7.0. It accepts a reducer function with the application initial state, returns the current application state, then dispatches a function.
Here is an example of how it is used;
const [state, dispatch] = useReducer(reducer...
Getting to Know the useReducer React Hook
26.6.2019
useReducer is one of a handful of React hooks that shipped in React 16.7.0. It accepts a reducer function with the application initial state, returns the current application state, then dispatches a function.
Here is an example of how it is used;
const [state, dispatch] = useReducer(reducer...
An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods
26.3.2019
Map, reduce, and filter are three very useful array methods in JavaScript that give developers a ton of power in a short amount of space. Let’s jump right into how you can leverage (and remember how to use!) these super handy methods.
Array.map()
Array.map() updates each individual value in...
Understanding the Almighty Reducer
13.6.2018
I was reently mentoring someone who had trouble with the .reduce() method in JavaScript. Namely, how you get from this:
const nums = [1, 2, 3]
let value = 0
for (let i = 0; i < nums.length; i++) {
value += nums[i]
}
...to this:
const nums = [1, 2, 3]
const value = nums.reduce((ac, next)...