There are some unfortunate statements in there (if taken out of context) that requires you to read the whole thing for it to make sense. Like "...but most of th

There are some unfortunate statements in there (if taken out of context) that requires you to read the whole thing for it to make sense. Like "...but most of the array is still zeros, so it isn't actually taking up any memory..." which is a bit ambigious if not read in the complete context, then it makes sense.