Pool{Type}Array has no method 'has'

[toby3d]

Godot version: 3.2.3.rc1
OS/device including version: Linux 5.7.9-1-MANJARO
Issue description: Unlike Array, PoolStringArray, PoolIntArray and others doesn't have a method to check if an element is present.

Steps to reproduce / Minimal reproduction project:

var _array: Array = ['a', 'b', 'c']
_array.has('b') # true
_array.has('z') # false

var _array: PoolStringArray = ['a', 'b', 'c']
_array.has('b') # The method "has" isn't declared on base "PoolStringArray"

There are two workarounds to solve this:

var _array: PoolStringArray = ['a', 'b', 'c']
(_array as Array).has('b') # true
(_array as Array).has('z') # false

static func has_string(src: PoolStringArray, find: String) -> bool:
	for item in src:
		if item != find:
			continue
		
		return true

	return false

...

var _array: PoolStringArray = ['a', 'b', 'c']
has_string(_array, 'b') # true
has_string(_array, 'z') # false

[Calinou]

This was implemented by #32144, but I'm not sure if it's worth remaking for the 3.2 branch.

[timothyqiu]

Fixed by #60856