update

Task/Concurrent-computing/C++/concurrent-computing-1.cpp

@@ -0,0 +1,27 @@
+#include <thread>
+#include <iostream>
+#include <vector>
+#include <random>
+#include <chrono>
+
+int main()
+{
+  std::random_device rd;
+  std::mt19937 eng(rd()); // mt19937 generator with a hardware random seed.
+  std::uniform_int_distribution<> dist(1,1000);
+  std::vector<std::thread> threads;
+
+  for(auto& str: {"Enjoy\n", "Rosetta\n", "Code\n"}) {
+    // between 1 and 1000ms per our distribution
+    std::chrono::milliseconds duration(dist(eng));
+
+    threads.push_back(std::thread([str, duration](){
+      std::this_thread::sleep_for(duration);
+      std::cout << str;
+    }));
+  }
+
+  for(auto& t: threads) t.join();
+
+  return 0;
+}

Task/Concurrent-computing/C++/concurrent-computing-2.cpp

@@ -0,0 +1,20 @@
+#include <iostream>
+#include <ppl.h> // MSVC++
+
+void a(void) { std::cout << "Eat\n";   }
+void b(void) { std::cout << "At\n";    }
+void c(void) { std::cout << "Joe's\n"; }
+
+int main()
+{
+    // function pointers
+    Concurrency::parallel_invoke(&a, &b, &c);
+
+    // C++11 lambda functions
+    Concurrency::parallel_invoke(
+        []{ std::cout << "Enjoy\n";   },
+        []{ std::cout << "Rosetta\n"; },
+        []{ std::cout << "Code\n";    }
+    );
+    return 0;
+}

Task/Concurrent-computing/Racket/concurrent-computing.rkt

@@ -1,4 +1,3 @@
 #lang racket
-
 (for ([str '("Enjoy" "Rosetta" "Code")])
   (thread (λ () (displayln str))))