Scratch

Arrays are a type of variable.  But instead of holding just one number, they can hold a whole lot of numbers.  You tell it which number you want to work with by changing an index value.  Here's an example using a language like Basic where we have an array called Size which is assigned some values:

     Size(1) = 10
     Size(2) = 15
     Size(3) = 32

You can see that the name of the array, Size, stays the same but the index value changes from 1 to 2 to 3.  The array is holding three numbers all at once.  Arrays can hold lots of data - hundreds or thousands of values.  And the data can be accessed easily in a loop, simply by changing the index value.  In most languages, arrays can do more than just hold numbers;  you can make arrays that hold words or other types of data.  You can do some cool things with arrays.

Scratch is expected to have arrays in version 1.3 but they will probably look quite a bit different from what I have shown here.  The basic idea, however, will be the same.

coolstuff wrote:

Paddle2See wrote:

Arrays are a type of variable.  But instead of holding just one number, they can hold a whole lot of numbers.  You tell it which number you want to work with by changing an index value.  Here's an example using a language like Basic where we have an array called Size which is assigned some values:

     Size(1) = 10
     Size(2) = 15
     Size(3) = 32

You can see that the name of the array, Size, stays the same but the index value changes from 1 to 2 to 3.  The array is holding three numbers all at once.  Arrays can hold lots of data - hundreds or thousands of values.  And the data can be accessed easily in a loop, simply by changing the index value.  In most languages, arrays can do more than just hold numbers;  you can make arrays that hold words or other types of data.  You can do some cool things with arrays.

Scratch is expected to have arrays in version 1.3 but they will probably look quite a bit different from what I have shown here.  The basic idea, however, will be the same.

They are actually quite similar to what you said (I have the beta). Except that they're called lists. There's a variable display type thing which actually looks quite strange, but you can resize it and all. There are also a few blocks:
add [thing] to list (you can type or drag a variable as variables can be either text strings or numbers),
delete (all, first, last, or number) of list,
insert [thing] at (first, last, or number) of list,
replace (first, last, or number) of list with [thing],
then there are the variable blocks for the arrays.
item (1) of list
length of list

it's pretty easy to use, actually. when i first saw them, I thought I wouldn't understand them, but they're simpler than they look.

Actually, I have the beta too and I've been working with it quite a bit.  But the Scratch Team asked us to not discuss beta features on the forums as it might confuse people.  Also, the final form might change before the official release - remember the Comment Block!

Quaggledorf wrote:

Does anyone know if you can add a sprite to a lsit and, if so, how do you do it?

You can't, that's a feature of object-oriented programming that's taking its sweet time to get to Scratch. You can give each sprite a "name" variable and add that to a list, it might help you accomplish whatever you're trying to do.

Thanks a lot!

try my base project "Matrix"
Its a list of lists = array of arrays = matrix of matrices ...
these list can store numbers and strings/text/characters

TimeFreeze wrote:

um... Can people stop necroposting? It's really annoying. I think this should be closed.

If you don't know what necroposting is, it's posting on a topic that has not been posted on in a long time.

Well, someone might have a question or comment about arrays in the future, I don't believe there's a need to close this thread. Besides, the last few posts are within few days of each other (the big jump in time is from Quaggledorf's post to raywili's post), and it seems to have remained on topic. 

TimeFreeze wrote:

oh yeah... Sorry.

Btw, I thought that P2S's post and Quaggledorf's post was the big jump.

I was referring to the last big time difference in posting (the one that could, in a sense, be qualified as the last necropost in this thread). And it's alright.