User:BryghtShadow

Hi!

Code samples

Variables

Although mw:Extension:Variables is probably what should be used, mw:Extension:Arrays can also be used to store and retrieve a variable.

• To store the variable, use #arraydefine with the value and specify the delimiter to something that isn't in the variable, e.g. <nowiki/>.
• To retrieve the variable, use either #arrayprint or #arrayindex. #arrayindex has the benefit of default values if the result is empty.

## Python code          ### Wiki code
# The array contains an item, so print and index both print the item.
foo = ["42"]            # {{#arraydefine:foo|42|<nowiki/>}} → 
print("".join(foo))     # {{#arrayprint:foo}} → 42
print(foo[0:] or "bar") # {{#arrayindex:foo|0|bar}} → 42
# The array is empty, so print returns empty, and index returns the default.
foo = []                # {{#arraydefine:foo||<nowiki/>}} → 
print("".join(foo))     # {{#arrayprint:foo}} → 
print(foo[0:] or "bar") # {{#arrayindex:foo|0|bar}} → bar

Loops

Using mw:Extension:Arrays, it is possible to create an array of "keys", which is then used on a dictionary or array. While manually maintaining the array may be useful in some cases, a large array can be created with nested loops. One of the possible ways is outlined below.

1. Define the array of "numbers" that will be used as keys/indices (such as 0-9). This will be iterated over for each "digit" (ones, tens, hundreds, so on).
2. Using arrayprint, go over each item in the above array. Nest for each digit (ones, tens, hundreds, so on). If integers, using #expr to keep the output small is recommended.
3. Assign the result into an array (can override previous arrays if they are no longer needed).
4. Slice the array of indices if required. Here, you can specify the starting index and the length.
5. Finally, iterate over this sliced array and use each key to do something, such as going through ObjectInformation.

# python
digits  = [0,1,2,3,4,5,6,7,8,9]
ids_10  = [n for n in digits]
ids_100 = [int('{}{}'.format(n,m)) for n in digits for m in digits]
ids_55  = ids_100[0:55]

The following code...

{{#if:
 {{#arraydefine:digits|0,1,2,3,4,5,6,7,8,9|,}}
 {{#arraydefine:ids_10|
   {{#arrayprint:digits|,|@@@|{{#expr:@@@}}}}
 |,}}
 {{#arraydefine:ids_100|
   {{#arrayprint:digits|,|@@@|
     {{#arrayprint:digits|,|###| {{#expr:@@@###}} }}
   }}
 |,}}
 {{#arrayslice:ids_55|ids_100|0|55}}
}}
* digits = {{#arrayprint:digits}}
* ids_10 = {{#arrayprint:ids_10}}
* ids_100 = {{#arrayprint:ids_100}}
* ids_55 = {{#arrayprint:ids_55}}

... results in...

• digits = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
• ids_10 = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
• ids_100 = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99
• ids_55 = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54