Don't use functions as callbacks unless they're designed for it

Re:Don't use functions as callbacks unless they're designed ... by franciscop on Saturday February 06, 2021 @06:23AM (#26045837)

This seems to work on Python:

  def hello(a, b = 'world'):
      print(a, b)

  hello('hello')
  hello('hello', 'world')

But these don't, so fair point:

  hello('hello', 'world', 'there)
  # nor
  def hello(a):
  ...
  hello('hello', 'world')

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Re:Don't use functions as callbacks unless they're designed ... by username90 on Saturday February 06, 2021 @07:33AM (#26046110)

Yeah, problem with JavaScript function signatures is that every function argument is optional, including all the arguments you didn't write.

In python those functions would look like:

    def F(a = None, b = None, *args): ...

And you can't write any other kind of function in javascript. I don't really like that aspect of javascript, it creates so many hard to debug situations.

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Re:Don't use functions as callbacks unless they're designed ... by mechEpleb on Saturday February 06, 2021 @07:33AM (#26046112)

The first is an example of default argument syntax, it doesn't mean you can call functions with extra arguments, only that a value will be provided from the declaration if the call doesn't.

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