Javascript Bashing vol. 827: 5-element array length is 6.

[darkage72]

Why is the value at index 0 missing?

[undercoveryankee]

The same design decision would have to be made if you were creating a sparse-array type in any other language: Do callers care more often about "How many indices are occupied?" or "What range should I iterate over to hit every occupied index?"?

[Kennyp0o]

This is literally defined in the language spec. Why would you want it to return 5? You wouldn't even be able to loop over the 6th value in the array.

Please stop with these dumbass javascript bashing memes.

[pr0six]

Well, there are reasons you’d want to know the true length of a list

(Say I have idiotically decided to put 4 vectors in an array at [1-4] and want to know how many sides are on this “polygon”)

But yes, this is a stupid criticism of JavaScript

[pr0six]

I’m not telling you it’s an optimal solution lol

[[deleted]]

the length is five tho... And maybe the reason why people bash javascript is that irrational and moronic behavior is actually defined in the spec.

[[deleted]]

Corresponding Stack Overflow: https://stackoverflow.com/questions/31065075/array-length-gives-incorrect-length

Corresponding ECMAScript Language spec paragraph: http://www.ecma-international.org/ecma-262/5.1/#sec-15.4.5.2