[Question]Little Array Problem

[nikneym]

How can I get the number of elements in an array?

[Nixola]

numberOfElements = #array

Note that the above only works if it's an array with consecutive integer indexes starting from 1; it won't count non-integer indexes or indexes less than or equal to 0, and it will stop at the first hole it encounters. E.g:

Code: Select all

> array = {1, 2, 3}
> array[5] = 4
> print(#array)
3
> array[4] = 5
> print(#array)
5

[nikneym]

numberOfElements = #array

Note that the above only works if it's an array with consecutive integer indexes starting from 1; it won't count non-integer indexes or indexes less than or equal to 0, and it will stop at the first hole it encounters. E.g:

Code: Select all

> array = {1, 2, 3}
> array[5] = 4
> print(#array)
3
> array[4] = 5
> print(#array)
5

Thanks solved.

[Ragzouken]

Just a small correction: you can't rely on # to stop at the first hole. The only guarantee is that t[#t] ~= nil and t[#t+1] == nil. On the other hand, ipairs will definitely stop at the first hole.