MilkJar – Medium

Dec 5, 2020

React useCallback hook notes

Recently I received a comment on a blog post. It suggested that the event handler functions in my code example should be wrapped with useCallback. This seems to be a common misconception. To really get our heads around useCallback lets look at something tangible. The following is a very simple…

React

2 min read

React

2 min read

Jun 20, 2020

Pass parameters to React event handler without wrapping the function

Its common to need to pass arguments to a React event handler (such as onClick or onChange) when a button is clicked or radio input changed. In the following code we pass the rate function to the onClick property, the problem is that we also want to pass the selected…

React

2 min read

React

2 min read

Aug 31, 2017

Sequentially process a list of asynchronous tasks using array reduce

We can use Array.reduce and Promises to sequentially process a list of async actions, such as XHR requests, ensuring they are processed in the order they are supplied. function createSequentialProcessor(iterator) { // return a function that accepts the items to be processed return (items) => { …

Java Script

1 min read

Java Script

1 min read

Nov 16, 2016

A quick tour of JavaScript primitives

Primitives are the simplest elements of a programming language. JavaScript currently has six primitive types: string, number, boolean, null, undefined, symbol , everything else is an object — yes, including arrays and dates. All the types are used to define immutable values — values which can not be changed. …

Java Script

3 min read

Java Script

3 min read

Oct 24, 2016

Using ES6 to create a tiny, functional library

The code related to this post: https://github.com/dvemac/tinyfun Functional programming allows us to craft applications using functions as building blocks. Wiring simpler functions together to define more complex functions & business logic. …

Java Script

5 min read

Using ES6 to create a tiny, functional library

Java Script

5 min read

Sep 15, 2015

Decoding non-trivial JSON data in Elm

Trying to decode the following JSON [ { "key": [ "step", "17" ], "value": { "id": "1000000000", "active": true…

Programming

1 min read

Programming

1 min read