Array delete failing

Hi everyone,

as the subject suggests, I am having trouble with the array object. I cannot report this as a bug since the problem only happens with a huge project I am working on, it has a lot of events, loops and some other stuff, however, the array loop and delete part is not tied to this stuff but I suppose the overall performance of this project, somehow, is affecting the delete part. I have and array of width 20 and height 2, depth 1. First, I fill the array with Infinity values, then I fill the the array with values depending on the activation of certain functions, lastly, when certain event occurs, I delete all the rows that have a the infinity value, when I do this, the rows containing Inifinity values are deleate but only partially. For example, 4 out of 40 of the array´s elements are filled with arbitrary values, the rest the values are filled with inifiny value, then the array deletes only 20 values o 10 rows that have the infinity value, so there are 8 rows with infinity value and 2 rows with the arbitrary values used before. I tried executing the delete loop 2 and 3 times in a row, and the elements were deleted successfully ,that way I could confirm is more of a performance problem more than a programming one (it is just a supposition), if I were having wrong code or something, the values in the array would never be deleted or would be a delete mess, but values are being deleted just that a slow pace if you will. I would really appreciate if you could help me with this one, thank you.

It sounds like you are deleting from the array while looping through it.

Imagine you want to loop through an array deleting any "A"s:

array = ["A", "A", "B"]

index = 0:

it's an "A" so delete it

array = ["A", "B"]

now the "A" that was at position 1 has moved to position 0.

index = 1:

that's a "B"

index = 2... done!

array = ["A", "B"]... you missed an "A"

Is that the problem you have?

it sounds like it, however, I did a test with a smaller project and there all the elements were deleted without a problem, however, if what you posted is the problem, do you have any suggestion?, and yes, I am deleting the elements from the array at the same time a iterate through it.

The solution is to loop backwards, which you can't do with the array 'for each' but you could with a for loop. Or you can loop through the array storing the indices of the elements you want to delete in another array and then delete them in reverse order.

Thank you man, it was quite easy to solve the problem using a system for loop backwards.