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The only const in life is to const all the things.
Why even use variables in the first place? Just place the values directly into your code. If you need to change a value, that’s just bad planning. Hell, why even use values either? Just run a loop on the INC instruction until you get the value you need. It’s just efficient programming.
can someone explain please?
Const everything by default
If you need to mutate it, you don’t, you need to refactor.
Dogmatic statements like this lead to bad, messy code. I’m a firm believer that you should use whatever style fits the problem most.
Although I agree most code would be better if people followed this dogma, sometimes mutability is just more clean/idiomatic/efficient/…
Define your terms before relying on platitudes. Mutability isn’t cleaner if we want composition, particularly in the face of concurrency. Being idiomatic isn’t good or bad, but patterned; not all patterns are universally desirable. The only one which stands up to scrutiny is efficiency, which leads to the cult of performance-at-all-costs if one is not thoughtful.
That is a… strange take.
Random example, imagine a variable that holds the time of the last time the user moved the mouse. Or in a game holding the current selected target of the player. Or the players gold amount. Or its level. Or health. Or current position.
In all those cases, the answer is to swap in a new variable and throw the old one away.