Unexpected output for table length

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1

Hi, I was working with tables and OOP, and I found some unexpected outputs with object lengths.

local object = {
	'bean',
	[5]='Bean2',
	['String bean']='Beans'
}
local object2 = {
	'bean',
	[3]='Bean2',
}
local object3 = {
	'bean',
	['string bean'] = 'bean'
}
local object4 = {
	'bean',
	[3] = 'bean',
	['string bean'] = 'bean'
}
print(#object)
print(#object2)
print(#object3)
print(#object4)

All four of these output 1.

2

A workaround for this would be to use something like this;

function getTableLength(tab)
	local totalLength = 0
	for _ in next, tab do
		totalLength = totalLength+1
	end
	return totalLength
end
4

Hello.

Here the explanation to why it gives “0” as output:

Table elements with non-numerical keys (Dictionarys) won’t count towards the length of the table when using either the # operator or the table.getn function.
The tables in your code have elements with non-numerical keys, thus the output: 0.

  • DosenSuppe2_0