Category: JavaScript

Array of objects to work with: Array.prototype.some() // is at least one person 19 or older? refactored with an array function //refactored

As seen in the talk https://www.youtube.com/watch?v=e-5obm1G_FY I found this js snippet a nice introduction to higher order functions which is common in functional programming.

This code was taken from JavaScript30 by Wes Bos. This funcionality is common in applications so its handy to have as a code snippet!

refactored es6 style: I would avoid Wes Bos minimized solution below as it doesn’t return 0 on duplicates which result in unstable sorting when having duplicates in the array.

In this example we have a array of car objects and the goal is to take all the ford cards and add their km together

Add 1 event listener for the container but target the input nodes:

This is a IFFY Douglas Crockford style: More common seen in the wild: Note: If you are using this to keep variables in a scope you might consider if you want to use ‘let’ and ‘const’ instead if you are writing es6 code! Read more about that in our aticle about var, let and const …