fix core::decode

src/base4.rs

@@ -1,23 +1,3 @@
-/*
-def decode(string):
-    """Decode a Base 4 encoded string into the number
-    Arguments:
-    - `string`: The encoded string
-    - `alphabet`: The alphabet to use for decoding
-    """
-    base = len(alphabet)
-    strlen = len(string)
-    num = 0
-
-    idx = 0
-    for char in string:
-        power = (strlen - (idx + 1))
-        num += alphabet.index(char) * (base ** power)
-        idx += 1
-
-    return num
- */
-
 pub fn alphabet() -> Vec<String> {
     return vec!["meow", "mrrp", "mreow", "mrow"]
         .into_iter()

src/core.rs

@@ -1,5 +1,5 @@
 //! Handles conversion one word at a time for any base
-
+// based off this SO answer: https://stackoverflow.com/a/1119769
 use std::ops::Index;
 
 use crate::base4::alphabet;
@@ -31,20 +31,20 @@ pub fn num_to_cat(num: u32, alphabet: Vec<String>, char_length: u32) -> String {
 /// Converts catspeak to a [`u32`]
 pub fn cat_to_num(text: Vec<String>, alphabet: Vec<String>, char_length: u32) -> u32 {
     let mut nums: Vec<u32> = Vec::new();
-    for word in text.clone() {
+    for word in text {
         for i in 0..alphabet.len() {
             if word == alphabet[i] {
                 nums.push(i as u32);
+                break;
             }
         }
     }
 
     let base = alphabet.len();
-    let idx = 0;
     let mut num = 0 as u32;
-    for n in nums {
-        let power = (text.len() - (idx + 1)) as u32;
-        num += n * (base as u32).pow(power);
+    for n in 0..nums.len() {
+        let power = (char_length - (n as u32 + 1)) as u32;
+        num += nums[n] * (base as u32).pow(power);
     }
     return num;
 }

src/main.rs

@@ -14,17 +14,6 @@ fn main() {
         stdin.read_line(&mut input).unwrap();
         let trimmed = input.trim();
         if trimmed == "1".to_string() {
-            input = "".to_string();
-            stdin.read_line(&mut input).unwrap();
-            println!(
-                "{}",
-                core::cat_to_num(
-                    input.trim().to_string().split(" ").into_iter().map(|item| item.to_string()).collect(),
-                    base4::alphabet(),
-                    base4::char_length()
-                )
-            )
-        } else if trimmed == "2".to_string() {
             input = "".to_string();
             stdin.read_line(&mut input).unwrap();
             println!(
@@ -34,7 +23,24 @@ fn main() {
                     base4::alphabet(),
                     base4::char_length()
                 )
-            )
+            );
+        } else if trimmed == "2".to_string() {
+            input = "".to_string();
+            stdin.read_line(&mut input).unwrap();
+            println!(
+                "{}",
+                core::cat_to_num(
+                    input
+                        .trim()
+                        .to_string()
+                        .split(" ")
+                        .into_iter()
+                        .map(|item| item.to_string())
+                        .collect(),
+                    base4::alphabet(),
+                    base4::char_length()
+                )
+            );
         } else {
             println!("Invalid input, exiting...");
             break;