What did I learn teaching C++ to beginners
summary
A short module on the standard library reveals that iterators confuse beginners after spending class time on referencing incrementing and comparisons and still not finding real-world use cases, so the instructor stops covering odd edge cases like the string slice inconsistency between single and two-argument forms and omits them from lessons; as a practical aside a crude but working reverse indexing implementation for random access iterators is shown; main claim: focus cognitive effort on core, useful concepts.
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