Scratch

This is a standard for programming languages! I don't understand why Scratch can't have it. It is possible to replace a 2-D array with several lists, or one list that is very long, but that is time consuming.

Count my vote for this in  !

bump

joefarebrother wrote:

I won't finish my AI tic-tac-toe until this is implemented!!!

I actually was working on a Connect Four game w/ AI, but imagine how difficult it would be without matrices!   

bump

Excellent idea! Matrices would be really cool. I don't need it now, but in other projects, it would be handy!

I suggest that arrays can be made in Scratch 2.0 like in BYOB.

For those of you who don't know the difference between an array and list, look here.
If you don't want to, then here's an explanation:
Variables are one value.


Lists are a set of values, but only in one dimension, MEANING that you can only have |add thing to list|


Arrays are multidimensional lists, meaning that you can have |add <item 1 of <item 1 of list>>to list|  if you have a three dimensional array.

Made using BYOB


Ways it will be useful: One grand array, with sub-lists inside.  Particularly useful for some OS's.

Paddle2See wrote:

I would like higher order arrays...but we must remember that Scratch's first goal is to be approachable to beginners.  You can always construct an indexing formula so that a 2D array can be stored in a 1D array.

Example:

If you want to store a 2D array with rows that are 9 elements long in a 1D list then the formula might be

Item_Number = (Row_Number-1) * 9 + Column_Number

you said "Scratch's first goal is to be approachable to beginners" but what is you did not put it in scratch and put it on the scratch web site, so we can put it in our scratch image?

I posted once, that they should add tables.
I support!!!

to make a 2D array, you just need a list with strings; the letter position in the strings is the third direction.

Maybe. Sounds good.

This would be a great step towards making strategy games more common among Scratch projects.    Here are a few block I think might be nice:

when gf clicked
delete [all v] of table [Terrain v]
repeat until <(join ((# of rows v) of table (Terrain v)) ((# of columns v) of table (Terrain v))) = (99)>//Scratch does not like nonexistent blocks. :P
add (0) to table [Terrain v] in [row v](1)//Adds an item to the end or a row/column.
add (0) to table [Terrain v] in [column v](1)
end
insert (1) to table [Terrain v] in row(5) col(5)//Replaces this item with another.
replace [row v](9) of table [Terrain v] with (1)//Replaces entire row with one item.
replace [column v](9) of table [Terrain v] with (1)
replace [all v] [empty blocks v] of table [Terrain v] with (0)//Replaces all items of a type (empty/full) with one item.

11:1 21:1 31:1 41:1 51:1 61:1 71:1 81:1 91:1
12:1 22:0 32:0 42:0 52:0 62:0 72:0 82:0 92:1
13:1 23:0 33:0 43:0 53:0 63:0 73:0 83:0 93:1
14:1 24:0 34:0 44:0 54:0 64:0 74:0 84:0 94:1
15:1 25:0 35:0 45:0 55:1 65:0 75:0 85:0 95:1
16:1 26:0 36:0 47:0 56:0 66:0 76:0 86:0 96:1
17:1 27:0 37:0 47:0 57:0 67:0 77:0 87:0 97:1
18:1 28:0 38:0 48:0 58:0 68:0 78:0 88:0 89:1
19:1 29:1 39:1 49:1 59:1 69:1 79:1 89:1 99:1

I really hope this gets implemented... 

Hey, use this.

1. 1. 1.
orange. 1. 1.
1. 1. 1. asparagus. 1.

becomes

1.
1.
1.
orange.
1.
1.
1.
1.
1.
asparagus.
1.

and is named "array" and another list is created, with the lengths, added with the previous one:

3.
6.
11.

and then

(item ((item (y) of [lenghts v]) - ((item (y) of [lenghts v]) - (x))) of [array v])

Last edited by BirdByte (2012-09-16 08:46:58)

OverPowered wrote:

zammer990 wrote:

It's already possible, my game Path uses a 16x16 array with the (letter () of []) block. And to edit one you just load the item you need into a separate list as single items, edit it and replace the old item. For items larger than 1 letter, you just iteratively add it to a temp until it reaches a break character (a space) then adds that to the edit list.
I just don't think enough people would use it for there to be a need, especially since there is a workaround.

People would only use this for every tile-based game, like Minecraft-style games on Scratch, strategy gams like Civilization, and most board games... One reason these are less prevalent, I believe, is that it's harder to program these than simpler action games or animations. This makes those games easier.

The "workaround" you speak of needs a text parser that completely rewrites an item both for input and output for changes to the list. This might be feasible for a 16x16 board, but if it is much larger, such as 40x30, then rewriting an entire line for only one change means also inefficiently rewriting 39 unneeded blocks within that item. This is just a horribly slow process and really could be simplified with a table. 

You could just use a list, like me and birdbyte do. One place for each element. This generalizes to higher dimensions too!