--[=[
	@within TableUtil
	@function Keys
	@param tbl table
	@return table

	Returns an array with all the keys in the table.

	```lua
	local t = {A = 10, B = 20, C = 30}
	local keys = TableUtil.Keys(t)
	print(keys) --> {"A", "B", "C"}
	```

	:::caution Ordering
	The ordering of the keys is never guaranteed. If order is imperative, call
	`table.sort` on the resulting `keys` array.
	```lua
	local keys = TableUtil.Keys(t)
	table.sort(keys)
	```
]=]

local function Keys<K, V>(tbl: { [K]: V }): { K }
	local keys = table.create(#tbl)
	for k in tbl do
		table.insert(keys, k)
	end
	return keys
end
