Rust: What is the difference between any and all?

any — at least one matches. all — all match.

any:

• Returns true if any match.
• Short-circuit.
• For existence.

all:

• Returns true if all match.
• Short-circuit.
• For universal.

1let v = vec![1, 2, 3, 4, 5];
2
3// any: true (some > 3)
4let has_large = v.iter().any(|&x| x > 3);
5
6// all: false (not all > 3)
7let all_large = v.iter().all(|&x| x > 3);

Key: any for existential, all for universal.