Some operations in blz will create an error.
These can be recovered from using a try-catch block.
try print(1 / 0) # You can't divide by 0, this is an error catch error print("Oops! An error occurred") print(error) end
Or more realistically, perhaps you are parsing JSON
import JSON try json = "[1, 2, 3" # Oops, no closing bracket. This JSON is invalid parsed = parse_json(json) do_something_with(parsed) catch json_error print("Provided JSON was invalid!") do_something_with() end
Any kind of object can be thrown as an error, so make sure to check the documentation of the library used to see what kind of object you should handle.
To create an error, you can use the
:divide(numerator, denominator) if denominator == 0 throw "Denominator was 0" # Raise an exception end # If the denominator is not 0, then proceed with the division numerator / denominator end