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4 points by akkartik 8 days ago | link | parent

I actually tend to the opposite: use with everywhere unless I need withs. The reason isn't performance. It tends to make code more elegant to not rely on the order in which things are defined. And when I'm reading code, with gives me the warm fuzzies that the code is going to be cleaner. When I see withs I slow down to look at the dependencies between the bindings.




3 points by zck 7 days ago | link

Similarly to this, when I'm writing Java, I use `final`^1 everywhere I can. It's nice to be able to know that anywhere later where the variable declared final is in scope, it will have the same value as at the point it's set. I don't need to look through any code to see if it's rebound; I know it hasn't been.

[1] "final" is kind of like "const", if I understand `const` right. `final int x = 3;` means that it is an error to later have the line of code `x = 4;`.

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3 points by prestonbriggs 8 days ago | link

OK, I get it, thanks. In scheme, I would use letrec for this situation; my intuition for Arc isn't very well developed.

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