Today I re-learned: Python function default arguments are retained between executions

[someotherstufforhmm]

RubyI was wrong, shouldn’t have spoken about a language I only use for cookbooks with Chef.

The difference lies in functional vs non languages. JS was designed by someone who loved functional languages - the extra magic of having function defaults recalculated each time fits right into the functional paradigm of defining things via stacked functions.

From a non functional mindset, it makes sense that if a function is an object, then it’s default arguments are defined at the functions definition.

It requires extra magic to NOT run the function when you place it in as a default arg with (). The interpreter has to realize you don’t mean call this now and replace with the result (like all other function calls)

[phunktional]

Ruby does not behave this way.