Merge pull request #940 from adamcrussell/challenge-034

Challenge 034

5 files changed, 69 insertions, 0 deletions

diff --git a/challenge-034/adam-russell/blog.txt b/challenge-034/adam-russell/blog.txt
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index 0000000000..840b342947
--- /dev/null
+++ b/challenge-034/adam-russell/blog.txt
@@ -0,0 +1 @@
+https://adamcrussell.livejournal.com/11703.html
diff --git a/challenge-034/adam-russell/cxx/ch-1.cxx b/challenge-034/adam-russell/cxx/ch-1.cxx
new file mode 100644
index 0000000000..c4760d5ddb
--- /dev/null
+++ b/challenge-034/adam-russell/cxx/ch-1.cxx
@@ -0,0 +1,28 @@
+/**
+* Write a program that demonstrates using hash slices and/or array slices.
+**/
+#include <map>
+#include <vector> 
+#include <string>
+#include <iostream>
+#include <algorithm> 
+#include <iterator> 
+
+void print_element(std::string s){
+    if(s != "")
+        std::cout << s << std::endl; 
+}
+
+int main(int argc, char** argv){ 
+    std::vector<int> v {2, 4}; 
+    std::map<int, std::string> mapExp = { {1, "first"}, {2, "second"}, {3, "third"}, {4,"fourth"} };
+    std::vector<std::string> vValue;
+    std::transform(mapExp.begin(), mapExp.end(), std::back_inserter(vValue),
+       [=](const std::pair<int, std::string> &mapItem){
+             std::vector<int>::const_iterator iter = std::find(v.begin(), v.end(), mapItem.first);
+             if(iter != v.end())
+                 return mapItem.second;
+             return std::string("");
+       });
+    std::for_each(vValue.begin(), vValue.end(), print_element);  
+}
diff --git a/challenge-034/adam-russell/cxx/ch-2.cxx b/challenge-034/adam-russell/cxx/ch-2.cxx
new file mode 100644
index 0000000000..9ea156c0ae
--- /dev/null
+++ b/challenge-034/adam-russell/cxx/ch-2.cxx
@@ -0,0 +1,16 @@
+/**
+* Write a program that demonstrates a dispatch table.
+**/
+#include <map>
+#include <string> 
+#include <iostream>
+#include <functional>
+
+int main(int argc, char** argv){
+  std::map< const std::string , std::function<void(void)> > dispTable{
+      {"hello",[](){ std::cout << "Hello!" << std::endl; } },
+      {"goodbye",[](){ std::cout << "Goodbye!" << std::endl; } } 
+  };
+  dispTable["hello"]();
+  dispTable["goodbye"]();
+};
diff --git a/challenge-034/adam-russell/perl5/ch-1.pl b/challenge-034/adam-russell/perl5/ch-1.pl
new file mode 100644
index 0000000000..6735816714
--- /dev/null
+++ b/challenge-034/adam-russell/perl5/ch-1.pl
@@ -0,0 +1,13 @@
+use strict;
+use warnings;
+##
+# Write a program that demonstrates using hash slices and/or array slices.
+##
+my %h = (
+    1 => "first", 
+    2 => "second", 
+    3 => "third", 
+    4 => "fourth"
+); 
+my @a = @h{2, 4};
+print join("\n", @a) . "\n";  
diff --git a/challenge-034/adam-russell/perl5/ch-2.pl b/challenge-034/adam-russell/perl5/ch-2.pl
new file mode 100644
index 0000000000..f44f0f09db
--- /dev/null
+++ b/challenge-034/adam-russell/perl5/ch-2.pl
@@ -0,0 +1,11 @@
+use strict;
+use warnings;
+##
+# Write a program that demonstrates a dispatch table.
+##
+my %dispatch_table = (
+    hello => sub { print "Hello!\n"; }, 
+    goodbye => sub { print "Goodbye!\n"; } 
+);
+$dispatch_table{hello}();   
+$dispatch_table{goodbye}();