How can I check: "is table empty"?

[Flaker]

How can I check: "is table empty"?

[Booo]

How can I check: "is table empty"?

if table == nil then 
print("table is empty") 
end 
  

[Flaker]

Thanks alot

[Booo]

Thanks alot

You're welcome

[Kenix]

How can I check: "is table empty"?

if table == nil then 
print("table is empty") 
end 
  

It's wrong! You check if variable is nil.

I written this function

  
function table.empty( a ) 
    if type( a ) ~= "table" then 
        return false 
    end 
     
    return not next( a ) 
end 
  

[Callum]

If it's an ipairs (the most common form) table, you can simply use

#tableName 

and it will return how many items are in the table.

If it's a pairs, you can use

tableCount = 0 for k, v in pairs(tableName) do tableCount = tableCount+1 end 

[Kenix]

If it's an ipairs (the most common form) table, you can simply use

#tableName 

Wrong.

Example

print( 'empty = ' .. tostring( #{ [0] = 'a' } == 0 ) ) -- empty = true 

Operator # used ipairs method for calculate!

ipairs loop only numeric indexes ( from 1 index ) and only in order.

Use my function.

  
function table.empty( a ) 
    if type( a ) ~= "table" then 
        return false 
    end 
     
    return not next( a ) 
end 

Example

  
print( 'empty = ' .. tostring( table.empty { [0] = 1 } ) ) -- false 
print( 'empty = ' .. tostring( table.empty { [10] = 10, [2] = 2 } ) ) -- false 
print( 'empty = ' .. tostring( table.empty { } ) ) -- true 
  

Added to useful functions.

https://wiki.multitheftauto.com/wiki/Table.empty