Probably you've come over this problem once in a while, too.
You have a repeating solution, so you use a for(each) loop.
Sometimes, there is an action to be performed between the end of
one iteration and the beginning of the next, if there is one. The
prime example is printing the comma when printing a list: There
is one between any two elements, but neither is one at front or
behind the last one.
Typical solutions I employed were:
1 Handling the first element separately
2 Condition in the loop, that is false exactly for the first
1 can be done with ranges easily:
foreach (element; range)
This approach is clearly quite verbose for the problem, but
there's nothing done unnecessarily.
2 can be done easily, too:
foreach (i, element; range)
if (i > 0) betweenAction();
While 2 is less code, it's prone to be checked every iteration.
Note that 2 is rather D specific in its length. It can be done in
other languages, but is more verbose.
Is there a cleaner solution that I missed?