Patarakin: 1 версия импортирована

2022-07-21T08:33:15Z

1 версия импортирована

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scratch>Bigpuppy: Replaced incorrect use of "i.e." with "for example"; added necessary "that"

2020-06-14T15:35:55Z

Replaced incorrect use of "i.e." with "for example"; added necessary "that"

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{{merge|Array|date=June 2019}}
{{see also|Array}}
A '''multidimensional array''' is an array that contains other arrays of the same length; for example, an array with length 3 that contains 3 arrays, each of length 3. Currently, [[Scratch]] does not support such arrays; however, they can be replicated with [[string]]s. To do so, one compiles one [[list]] into a string (separated by a character such as a semicolon), adds that string as an item to a second list, compiles the second list into another string, and adds that string into a third list, then compiles that third list... and so on, for however many dimensions the array contains.

==Tutorial==
This tutorial assumes two [[variable]]s:
* <sb>(i)</sb>
* <sb>(r)</sb>
It also assumes (assuming this is a 3-dimensional list) three lists:
* <sb>(uno::list)</sb>
* <sb>(dos::list)</sb>
* <sb>(tre::list)</sb>
with "uno" actually storing the data.

===Retrieving a value===
This process decompiles the lists and retrieves one item, using the three [[index]]es provided.
<scratchblocks>
define retrieve item (a) (sep1) (b) (sep2) (c)
delete (all v) of [dos v]
delete (all v) of [tre v]
set [i v] to [0]
repeat (length of (item (a) of [uno v]))
set [r v] to [ ]
repeat until <(letter (i) of (item (a) of [uno v])) = (sep1)>
change [i v] by (1)
set [r v] to (join (r) (letter (i) of (item (a) of [uno v])))
end
add (r) to [dos v]
end
set [i v] to [0]
repeat (length of (item (b) of [dos v]))
set [r v] to [ ]
repeat until <(letter (i) of (item (b) of [dos v])) = (sep2)>
change [i v] by (1)
set [r v] to (join (r) (letter (i) of (item (b) of [dos v])))
end
add (r) to [tre v]
end
set [r v] to (item (c) of [tre v])
</scratchblocks>
The variable <sb>(r)</sb> is the value retrieved.

===Storing a value===
This process decompiles the lists, changes one value, then recompiles them.
<scratchblocks>
define store (data) in (a) (sep1) (b) (sep2) (c)
delete (all v) of [dos v]
delete (all v) of [tre v]
set [i v] to [0]
repeat (length of (item (a) of [uno v]))
set [r v] to [ ]
repeat until <(letter (i) of (item (a) of [uno v])) = (sep1)>
change [i v] by (1)
set [r v] to (join (r) (letter (i) of (item (a) of [uno v])))
end
add (r) to [dos v]
end
set [i v] to [0]
repeat (length of (item (b) of [dos v]))
set [r v] to [ ]
repeat until <(letter (i) of (item (b) of [dos v])) = (sep2)>
change [i v] by (1)
set [r v] to (join (r) (letter (i) of (item (b) of [dos v])))
end
add (r) to [tre v]
end
replace item (c) of [tre v] with (data)
set [i v] to [0]
set [r v] to [ ]
repeat (length of [tre v])
change [i v] by (1)
set [r v] to (join (join (r) (item (i) of [tre v])) (sep2))
end
replace item (b) of [dos v] with (r)
set [i v] to [0]
set [r v] to [ ]
repeat (length of [dos v])
change [i v] by (1)
set [r v] to (join (join (r) (item (i) of [dos v])) (sep1))
end
replace item (a) of [uno v] with (r)
</scratchblocks>
[[Category:Scripting Tutorials]]
[[Category:String Tutorials]]
[[Category:Variables and List Tutorials]]

Multidimensional Arrays - История изменений

Patarakin: 1 версия импортирована

scratch>Bigpuppy: Replaced incorrect use of "i.e." with "for example"; added necessary "that"