Lang	encode	byte of char	getbyte at index	get codepoint at pos	iter
Java	utf16	2	?	?	?
JavaScript	utf16	2	?	codePointAt(pos) → int	codepoint(Symbol.iterator)
Rust	utf8	4	bytes().nth	.chars().nth	?
Nim	utf8	1	[]	unicode.runeAt	byte(iterator items)
Go	utf8	1	[]	rune[pos]	?