pascal

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "play"
+version = "0.1.0"

Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "play"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

src/main.rs

@@ -0,0 +1,39 @@
+pub struct PascalsTriangle {
+    row_count: u32,
+}
+
+impl PascalsTriangle {
+    pub fn new(row_count: u32) -> Self {
+        Self { row_count }
+    }
+
+    pub fn rows(&self) -> Vec<Vec<u32>> {
+        let mut all_rows = vec![vec![1]];
+        for _ in 0..self.row_count {
+            all_rows.push(
+                self.get_next(
+                    all_rows
+                        .last()
+                        .unwrap()
+                        .iter()
+                        .map(|&x| x)
+                        .collect::<Vec<u32>>(),
+                ),
+            );
+        }
+        all_rows
+    }
+
+    pub fn get_next(&self, last_row: Vec<u32>) -> Vec<u32> {
+        let mut next_row: Vec<u32> = last_row.windows(2).map(|el| el[0] + el[1]).collect();
+        next_row.insert(0, last_row[0]);
+        next_row.push(*last_row.last().unwrap());
+        next_row
+    }
+}
+
+fn main() {
+    let abbb = PascalsTriangle::new(3);
+    let v = vec![1];
+    abbb.rows();
+}