The difference between using Array.of()
and the Array
constructor is how they both handle a single integer argument:
const x = Array.of(3); const y = new Array(3); console.log(x); // output: [3] console.log(y); // output: array of 3 empty slots console.log(x.length); // output: 1 console.log(y.length); // output: 3
As you can see from the example above, using the Array
constructor with a single argument creates an empty array with its length
property set, whereas Array.of()
creates a new Array
with a single element. However, if you were to supply multiple arguments to either, Array.of()
or the Array
constructor, they would both yield the same result. To demonstrate this, let's look at the following example:
const x = Array.of(1, 2, 3); const y = new Array(1, 2, 3); console.log(x); // output: [1, 2, 3] console.log(y); // output: [1, 2, 3] console.log(x.length); // output: 3 console.log(y.length); // output: 3
You may use Array(…)
(as a function) and new Array(…)
interchangeably as both are equivalent.
This post was published by Daniyal Hamid. Daniyal currently works as the Head of Engineering in Germany and has 20+ years of experience in software engineering, design and marketing. Please show your love and support by sharing this post.