Next gripe about javascript.

The idiomatic way to create an array is

let something = [];

The idiomatic way to create an object is

let otherthing = {};

The idiomatic way to create a set

let myset = new Set();

The idiomatic way to create a map

let mymap = new Map();

AND
if you want to actually loop through the data in an object {}, you have to beware of prototype data that you never put in there, so you write

Object.entries(obj).forEach(([k,v]) => …)

or old school

for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
console.log(key, obj[key]);
}
}

#programming #javascript