Hi,
I'm trying to determine whether the last non-whitespace character of a
string is a colon, and I haven't been able to figure out the best way of
doing this. In python I'd just trim the string and look at the
character before the end, but while Racket seems to have a string-length
function, it doesn't seem to have anything analogous to trim. So how
should it be done?
The best I've come up with is to explode the string into a list of
characters, and handle it that way, but that's clearly quite wasteful of
both processing and RAM. (Of course, part of it is that the best way
I've figured to proceed from there is to then copy that list to another
list checking at each step of the way to tell if I was done, and then if
it was successful to join the resultant list back into a string.)
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