lua how to default value if nil
-- Function to assign a default value if the input is nil
function defaultValue(input, default)
return input or default
end
-- Example usage
local value = nil -- The value that might be nil
local defaultValue = defaultValue(value, "default") -- Assigning a default value if 'value' is nil
print(defaultValue) -- Output the resulting value
Explanation:
1. function defaultValue(input, default)
defines a function named defaultValue
that takes two parameters: input
and default
.
2. return input or default
is the line that performs the action. If input
is nil or false, it returns default
; otherwise, it returns input
.
3. local value = nil
initializes a variable value
with a value of nil
.
4. local defaultValue = defaultValue(value, "default")
calls the defaultValue
function, passing the value
variable and the default string "default"
as arguments. It assigns the result to the defaultValue
variable.
5. print(defaultValue)
outputs the resulting value to the console.