Create a two-dimensional array at runtime: Difference between revisions

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@@ Line 1,943: / Line 1,943: @@
     assert!(rows != 0 && cols != 0);
+    // Creates a vector of vectors with all elements initialized to 0.
-    let mut v = initialize_vec(|_| initialize_vec(|_| 0, cols), rows);
+    let mut v = init_vec(|| init_vec(|| 0, cols), rows);
     v[rows-1][cols-1] = 4;
     println!("{}", v[rows-1][cols-1]);
@@ Line 1,950: / Line 1,951: @@
 }
+// Returns a dynamically-allocated array of size `n`,
-fn initialize_vec<F,T>(f: F, size: usize) -> Vec<T>
+// initialized with the values computed by `f`
-    where F: Fn(usize) -> T
+fn init_vec<F,T>(f: F, n: usize) -> Vec<T>
+    where F: Fn() -> T
 {
-    let mut vec = Vec::with_capacity(size);
+    let mut vec = Vec::with_capacity(n);
-    for i in 0..size {
+    for i in 0..n {
-        vec.push(f(i));
+        vec.push(f());
     }
     vec