More examples

examples/par_sum.rs

@@ -7,11 +7,8 @@ fn par_sum(v: &[i32]) -> i32 {
         v.iter().copied().sum()
     } else {
         let half = (v.len() + 1) / 2;
-        Parallel::new()
-            .each(v.chunks(half), par_sum)
-            .run()
-            .into_iter()
-            .sum()
+        let sums = Parallel::new().each(v.chunks(half), par_sum).run();
+        sums.into_iter().sum()
     }
 }
 

src/lib.rs

@@ -35,6 +35,27 @@
 //! squares.sort();
 //! assert_eq!(squares, [100, 400, 900]);
 //! ```
+//!
+//! Compute the sum of numbers in an array:
+//!
+//! ```
+//! use easy_parallel::Parallel;
+//!
+//! fn par_sum(v: &[i32]) -> i32 {
+//!     const THRESHOLD: usize = 2;
+//!
+//!     if v.len() <= THRESHOLD {
+//!         v.iter().copied().sum()
+//!     } else {
+//!         let half = (v.len() + 1) / 2;
+//!         let sums = Parallel::new().each(v.chunks(half), par_sum).run();
+//!         sums.into_iter().sum()
+//!     }
+//! }
+//!
+//! let v = [1, 25, -4, 10, 8];
+//! assert_eq!(par_sum(&v), 40);
+//! ```
 
 #![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]