Remove unused import

day_04/src/crossword.rs

@@ -10,6 +10,27 @@ pub struct Crossword {
     height: usize,
 }
 
+pub struct WordPuller<'a> {
+    x: usize,
+    y: usize,
+    direction: (isize, isize),
+    crossword: &'a Crossword,
+}
+
+impl<'a> WordPuller<'a> {
+    pub fn take(&self, num_of_letters: usize) -> String {
+        let mut word = String::new();
+
+        for i in 0..num_of_letters {
+            let x = self.x as isize + (i as isize * self.direction.0);
+            let y = self.y as isize + (i as isize * self.direction.1);
+            word.push(self.crossword.data[x as usize][y as usize]);
+        }
+
+        word
+    }
+}
+
 impl Crossword {
     pub fn new(file: File) -> Result<Crossword, Box<dyn Error>> {
         let mut input_buffer = BufReader::new(file);
@@ -44,6 +65,71 @@ impl Crossword {
     pub fn height(&self) -> usize {
         self.height
     }
+
+    pub fn n(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (-1, 0),
+            crossword: self,
+        }
+    }
+    pub fn ne(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (-1, 1),
+            crossword: self,
+        }
+    }
+    pub fn e(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (0, 1),
+            crossword: self,
+        }
+    }
+    pub fn se(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (1, 1),
+            crossword: self,
+        }
+    }
+    pub fn s(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (1, 0),
+            crossword: self,
+        }
+    }
+    pub fn sw(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (1, -1),
+            crossword: self,
+        }
+    }
+    pub fn w(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (0, -1),
+            crossword: self,
+        }
+    }
+    pub fn nw(&self, x: usize, y: usize) -> WordPuller {
+        WordPuller {
+            x,
+            y,
+            direction: (-1, -1),
+            crossword: self,
+        }
+    }
 }
 
 impl Display for Crossword {

day_04/src/main.rs

@@ -24,6 +24,14 @@ fn main() -> Result<(), Box<dyn Error>> {
     let crossword = Crossword::new(File::open(input_file_string)?)?;
 
     println!("{}", crossword);
+    println!("n:  {}", crossword.n(3, 3).take(4));
+    println!("ne: {}", crossword.ne(3, 3).take(4));
+    println!("e:  {}", crossword.e(3, 3).take(4));
+    println!("se: {}", crossword.se(3, 3).take(4));
+    println!("s:  {}", crossword.s(3, 3).take(4));
+    println!("sw: {}", crossword.sw(3, 3).take(4));
+    println!("w:  {}", crossword.w(3, 3).take(4));
+    println!("nw: {}", crossword.nw(3, 3).take(4));
 
     Ok(())
 }