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fn main() {
println!("Hello, world!");
let tests = [
("ab", "ba", true),
("ab", "ab", false),
("aa", "aa", true),
("abcaa", "abcbb", false)
];
for test in tests {
println!("{:?} {:?} is {} should be {}", test.0, test.1,
Solution::buddy_strings(test.0.clone().to_string(), test.1.clone().to_string()),
test.2);
}
}
struct Solution;
use std::collections::HashMap;
impl Solution {
pub fn buddy_strings(s: String, goal: String) -> bool {
let mut occurences_s = HashMap::new();
let mut occurences_goal = HashMap::new();
let similarities = s.chars().zip(goal.chars()).filter(|(a,b)| {
*occurences_s.entry(a.clone()).or_insert(1) += 1;
*occurences_goal.entry(b.clone()).or_insert(1) += 1;
a != b})
.count();
s.len() == goal.len() && occurences_s == occurences_goal && (similarities == 2 || (similarities == 0 && occurences_s.values().any(|&x| x > 2)))
}
}
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