Array.resize() doesn't mention typed arrays

[thiagola92]

Your Godot version: v4.2.1.stable.official [b09f793f5]

Issue description:
It's silly to report this but this is incorrect when the array has type:

If the array size is smaller, elements are cleared, if bigger, new elements are null.

They receive the initialization value for their type.

var a = []
var b: Array = []
var c: Array[bool] = []
var d: Array[int] = []
var e: Array[float] = []
var f: Array[String] = []
var g: Array[Array] = []
var h: Array[Dictionary] = []

a.resize(1)
b.resize(1)
c.resize(1)
d.resize(1)
e.resize(1)
f.resize(1)
g.resize(1)
h.resize(1)

printt("a", a)
printt("b", b)
printt("c", c)
printt("d", d)
printt("e", e)
printt("f", f)
printt("g", g)
printt("h", h)

Result:

a	[<null>]
b	[<null>]
c	[false]
d	[0]
e	[0]
f	[""]
g	[[]]
h	[{  }]

URL to the documentation page:
https://docs.godotengine.org/en/latest/classes/class_array.html#class-array-method-resize

[Mickeon]

I was about to say that godotengine/godot#69451 would've solved it but even there it mentions null so I can keep this one in mind soon.

Technically saying null is not wrong internally, since if any null Variant is forced to convert, the result is what you see in the code sample above. Still, worth specifying.

[thiagola92]

any null Variant is forced to convert, the result is what you see in the code sample above. Still, worth specifying.

Hmmm interesting... I was going to guess that was calling something like type_convert() but it seems not.

var c: Array[bool] = [type_convert(null, TYPE_BOOL)]
var d: Array[int] = [type_convert(null, TYPE_INT)]
var e: Array[float] = [type_convert(null, TYPE_FLOAT)]
var f: Array[String] = [type_convert(null, TYPE_STRING)]
var g: Array[Array] = [type_convert(null, TYPE_ARRAY)]
var h: Array[Dictionary] = [type_convert(null, TYPE_DICTIONARY)]

printt("c", c)
printt("d", d)
printt("e", e)
printt("f", f)
printt("g", g)
printt("h", h)

Because null is converted to "<null>" instead of empty string like resize() does.

c	[false]
d	[0]
e	[0]
f	["<null>"]
g	[[]]
h	[{  }]

[Mickeon]

Well, actually, it may be more appropriate to say resized fills the array with the "default" for the given type. In other words it's the same value as an empty constructor for the type (except Object).

All of those type_convert are somewhat failing and returning the default as well, except the String conversion which does exist.

[thiagola92]

I should have read type_convert 😆
Well, everything make sense, thank you for the attention!