rust program

src/vamsi.rs

@@ -0,0 +1,27 @@
+
+// Here we have two sequences of data. These could be stored in vectors
+// or linked lists or whatever. Here we have _slices_ (references to arrays):
+let data1 = &[3, 1, 4, 1, 5, 9, 2, 6];
+let data2 = &[2, 7, 1, 8, 2, 8, 1, 8];
+
+// Let’s compute some valuable results from them!
+let numbers =
+    // By iterating over the first array:
+    data1.iter()            // {3,      1,      4,      ...}
+    // Then zipping this iterator with an iterator over another array,
+    // resulting in an iterator over pairs of numbers:
+    .zip(data2.iter())      // {(3, 2), (1, 7), (4, 1), ...}
+    // After that we map each pair into the product of its elements
+    // via a lambda function and get an iterator over products:
+    .map(|(a, b)| a * b)    // {6,      7,      4,      ...}
+    // Given that, we filter some of the results with a predicate:
+    .filter(|n| *n > 5)     // {6,      7,              ...}
+    // And take no more than 4 of the entire sequence which is produced
+    // by the iterator constructed to this point:
+    .take(4)
+    // Finally, we collect the results into a vector. This is
+    // the point where the iteration is actually performed:
+    .collect::<Vec<_>>();
+
+// And here is what we can see if we print out the resulting vector:
+println!("{:?}", numbers);  // ===> [6, 7, 8, 10]