Common symbol pairs

Two-symbol combinations: => -> :: ?. ?? ? : and more.

Lesson 5 / 16
Put your fingers on the home position (F and J) and press Space to start
const add = (a, b) => a + b; nums.map(n => n * 2) list.forEach(s -> System.out.println(s)); names.stream().map(String::trim) user?.name name ?? "guest" max = a > b ? a : b; def area(r: float) -> float: items.filter(x => x != null) let size = list?.length ?? 0;
 
Lesson 5: Common symbol pairs | Typing code|TypingStep