Bandera tricolor en Go

src/Go/003.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"sort"
+)
+
+var ORDER = []string{"R", "A", "M"}
+
+func tricolor_flag(lst []string) []string {
+	result := append([]string(nil), lst...) // copy (like Python sorted)
+	order := make(map[string]int, len(ORDER))
+	for i, v := range ORDER {
+		order[v] = i
+	}
+
+	sort.SliceStable(result, func(i int, j int) bool {
+		return order[result[i]] < order[result[j]]
+	})
+
+	return result
+
+}
+
+func main() {
+	check := []string{"M","R","A","A","R","R","A","M","M"}
+	fmt.Println(tricolor_flag(check)) // [R,R,R,A,A,A,M,M,M]
+
+	check = []string{"M", "R", "A", "R", "R", "A"}
+	fmt.Println(tricolor_flag(check)) // [R,R,R,A,A,M]
+}

src/Julia/003.jl

@@ -0,0 +1,13 @@
+ORDER = ("R", "A", "M")
+
+function tricolor_flag(lst)
+    order = Dict(value => idx for (idx, value) in enumerate(ORDER))
+    return sort(lst, by= x -> order[x])    
+end
+
+
+check = ["M","R","A","A","R","R","A","M","M"]
+println(tricolor_flag(check))  # [R,R,R,A,A,A,M,M,M]
+
+check = ["M", "R", "A", "R", "R", "A"]
+println(tricolor_flag(check))  # [R,R,R,A,A,M]

src/Python/003.py

@@ -0,0 +1,11 @@
+ORDER = ("R", "A", "M")
+
+def tricolor_flag(lst: list) -> list:
+    order: dict[str, int] = {value: idx for idx, value in enumerate(ORDER)}
+    return sorted(lst, key=order.__getitem__)
+
+check = ["M","R","A","A","R","R","A","M","M"]
+print(tricolor_flag(check))  # [R,R,R,A,A,A,M,M,M]
+
+check = ["M", "R", "A", "R", "R", "A"]
+print(tricolor_flag(check))  # [R,R,R,A,A,M]

src/Rust/003.rs

@@ -0,0 +1,20 @@
+const ORDER: [&str; 3] = ["R", "A", "M"];
+
+fn tricolor_flag<'a>(lst: &[&'a str]) -> Vec<&'a str> {
+    let mut ordered_lst = lst.to_vec();
+    ordered_lst.sort_by_key(|s| {
+        ORDER
+            .iter()
+            .position(|&v| v == *s)
+    });
+    
+    return ordered_lst
+}
+
+fn main() {
+    let check = vec!["M","R","A","A","R","R","A","M","M"];
+    println!("{:?}", tricolor_flag(&check)); // [R,R,R,A,A,A,M,M,M]
+
+    let check = vec!["M", "R", "A", "R", "R", "A"];
+    println!("{:?}", tricolor_flag(&check)); // [R,R,R,A,A,M]
+}