In strictly typed programming languages, array is a Data structure of homogeneous data types with fixed length. In contrast JavaScript is dynamic. ...
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Tuple is not Array in general definition. Tuple is implemented as Array in JS as there is no Tuple in the language. In Python(and many other) for example tuple syntax is different -
tuple = (1,2)and array isarr = [1,2]. The title of this article is misleading.Thank you for pointing out. I have changed the title and included Typescript as well. This article is written in context of Typescript. Yes other languages like Python have different syntax. But in Typescript we have this syntax for now. As @urielsouza29 pointed out we have already a proposal for native support for Tuple in Javascript which will have a different syntax.
A small mistake: arrays are not fixed length, not necessarily. Arrays in higher level type systems are usually dynamic in length. So the terms "array" and "vector" are often interchangeable.
But yes an array is a primitive homogenous collection. A tuple is a product type. Being a product type makes it have a constant number of different fields.
JavaScript/typescript is very dynamic. Which makes it very cool to do things like these - but I'm struggling to see where this will be beneficial? Having a class/interface with those properties on it is much easier to work with, pushing this type into a normal array. It also improves readability. Just because you can doesn't mean you should. I don't know - it's just my personal opinion. If you spend too much time trying to figure out what the previous developer did, you're already failing in writing maintainable code.
Thanks for your valuable insight.
I partially agree with you @jaspeling . We can return a class/interface. But at the same time it is type introduced in Typescript. And it is very common while writing custom hooks to return an array as I explained in my example. In React
useStateuses same kind of pattern.Ah, see I have no react knowledge. If that is a pattern used in a very well known framework, I guess I can see the value in a post like this.
I see. Yes, it can be bit confusing at first. When I switched to react and saw this pattern I had the same feeling 😊
As if JavaScript hasn't done enough damage already... a tuple is not an array.
Stage 2 TC39 Tuple github.com/tc39/proposal-record-tuple
Thank you for the link @urielsouza29
:)
Thanks for mentioning. Yes better DX :)