> Is "for i in 1:length(A)" ever correct? Yes, actually. While I have approximately zero knownledge of Julia specifically, a language-independent example might

> Is "for i in 1:length(A)" ever correct? Yes, actually. While I have approximately zero knownledge of Julia specifically, a language-independent example might be: B = OneBasedArray(length(A)) A_ = iter(A) for i in 1:length(A) { B[i] = pop(A_) } assert(iter_isdone(A_)) And if that looks contrived... yes; it is contrived. > that pattern followed by usage of i to index into A inside the loop? I can't think of any legitimate uses for that, but there probably are some; make sure to allow: len = length(A) for i in 1:len ... as a `if( (x = foo()) )`-style workaround.