My rule of thumb is to use them when I need them. Or what do you mean?
And what do you mean by “errors from guards”? If something raises in a guard, it is considered as if the whole guard is false.
My rule of thumb is to use them when I need them. Or what do you mean?
And what do you mean by “errors from guards”? If something raises in a guard, it is considered as if the whole guard is false.
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