151. 反转字符串中的单词

src/main.rs

@@ -3,50 +3,10 @@ mod tree;
 
 struct Solution {}
 impl Solution {
-    pub fn my_atoi(s: String) -> i32 {
+    pub fn reverse_words(s: String) -> String {
-        let mut ans = 0_i64;
+        s.split(' ').filter(|s| !s.is_empty()).rev().collect::<Vec<_>>().join(" ")
-        let mut neg = false;
-        let s = s.chars().collect::<Vec<_>>();
-        let mut start = 0;
-        for i in 0..s.len() {
-            if s[i] == ' ' {
-                start = i + 1;
-                continue;
-            }
-            start = i + if s[i] == '+' || s[i] == '-' {
-                if s[i] == '-' {
-                    neg = true
-                }
-                1
-            } else {
-                0
-            };
-            break;
-        }
-        for i in start..s.len() {
-            if s[i] == '0' {
-                start = i + 1;
-                continue;
-            }
-            break;
-        }
-        for i in start..s.len() {
-            let c = s[i];
-            if c.is_ascii_digit() {
-                ans = ans * 10 + if neg { -1 } else { 1 } * (c as u8 - '0' as u8) as i64;
-                if ans > i32::MAX as i64 {
-                    return i32::MAX;
-                }
-                if ans < i32::MIN as i64 {
-                    return i32::MIN;
-                }
-                continue;
-            }
-            break;
-        }
-        ans as i32
     }
 }
 fn main() {
-    println!("{:?}", Solution::my_atoi("1337c0d3".to_string()));
+    println!("{:?}", Solution::reverse_words("a good   example".to_string()));
 }