pcall

pcall stands for 'protected call' and it works by executing a function in a protected mode. If the function throws an error, pcall will catch it and return false, along with an error message. If no error occurs, pcall returns true, followed by the results of the function.
-- Define a function that might cause an error
local function riskyFunction()
    print("Attempting to perform a risky operation...")
    error("Something went wrong!")  -- deliberately cause an error
end

-- Use pcall to execute the riskyFunction safely
local success, errorMessage = pcall(riskyFunction)

if success then
    print("Risky operation was successful!")
else
    print("An error occurred:", errorMessage)
end
Using pcall is crucial in scenarios where failing silently or handling errors cleanly can prevent disruptions in gameplay. It ensures that even if an error occurs, the script can continue running and handle the situation appropriately, whether by retrying the operation, logging an error message, or providing fallback data.
  • Only use pcall where there is a real possibility of runtime errors that you want to catch. Overuse can make the code harder to debug and maintain.
  • Always log errors caught by pcall. In a development environment, knowing when and why errors occur is crucial.
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