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Who put this guy in charge
(ani.social)
Have to add that we work exclusively in strongly-typed languages. Kinda want to see how it plays out, but I can't help but argue with him, so I think I'll just go.
Typing when you need it gives you more freedom over a toggle. You can choose to type some parts of the code while leaving other parts untyped.
For example, if I'm writing a quick and simple Python script I may forgo typing, but when iterating on it I'd go back and add the types I need.
This isn't an issue, though. PHP has the same partial typing flexibility. There are ways to solve that issue and even typed PHP still allows union types including
mixedwhich allows any types.