On emoji use to convey intent and as a body language/facial expression substitute (45% of emoji use is 😀!) https://m.nautil.us/issue/50/emergence/why-you-need-emoji
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On writing code to communicate an idea or intent:
Rust has a lot of integer types, but I kinda like distinguishing u64 from usize. It communicates intent.
A usize is probably going to be used as an index, whereas a u64 is probably just a measurement of something.
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Avoiding the Maybe/option type to make intent clearer: