Added 0179-largest-number.rs

Author: ThanePatrol

rust/0179-largest-number.rs

@@ -0,0 +1,20 @@
+use std::cmp::Ordering;
+
+impl Solution {
+    pub fn largest_number(nums: Vec<i32>) -> String {
+        let mut ans = String::new();
+        let mut nums = nums;
+        let mut strs = nums.into_iter().map(|e| e.to_string()).collect::<Vec<String>>();
+        strs.sort_by(|a, b| {
+            let a_first = a.clone() + &*b;
+            let b_first = b.clone() + &*a;
+            b_first.cmp(&a_first)
+        });
+        for num in strs {
+            if ans == "0" && num == "0" {continue}
+            ans.push_str(&*num.to_string())
+        }
+
+        ans
+    }
+}