Merge https://github.com/YearOfProgramming/2017Challenges

yith

README.md

@@ -23,13 +23,18 @@ we will be posting ~~daily~~ periodic challenges for the community to complete.
 8. [Submission Review](#submission-review)
 
 ## The Administration Team
+- [slandau](https://github.com/slandau3 "slandau3")
+- [okraarmband](https://github.com/OkraArmband "OkraArmband")
+- [erocs](https://github.com/erocs "erocs")
 - [myrrlyn](https://github.com/myrrlyn "myrrlyn")
 - [jremillard](https://github.com/jarydremillard "jaryd remillard")
 - [sten](https://github.com/dashsten "dashten")
 - [manuel](https://github.com/ManuelMeraz "ManuelMeraz")
 - [marcus](https://github.com/MJUIUC "MJUIUC")
 - [ae1vtas](https://github.com/aev1tas "aev1tas")
 - [aakash](https://github.com/asethi77 "asethi77")
+- [flickdm](https://github.com/flickdm "flickdm")
+
 
 ## About Year of Programming
 

_bin/cpr

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Checkout Pull Request
 #
@@ -26,9 +26,28 @@ function merge_pr () {
 	git merge "${1}/${2}"
 }
 
+if [[ "$#" == "0" ]]; then
+	cat <<-EOS
+Usage:
+
+_bin/cpr get <username> <branch>, as seen when looking at a Pull Request on the
+web (see https://help.github.com/articles/checking-out-pull-requests-locally/)
+
+_bin/cpr merge <username> <branch> will merge the PR into master and open up
+your editor for a commit message.
+
+This function is only useful for admins, as we are the only ones with write
+access to the central repository. Don't bother running this in a fork of the
+central repo unless you *yourself* have incoming pull requests.
+	EOS
+	exit 0
+fi
+
 if [[ "$1" == "" ]]; then
 	echo "You must specify an action"
 	exit 1
+elif [[ "$1" != "get" && "$1" != "merge" ]]; then
+	echo "The subcommands are 'get' and 'merge'. They require a username and a branch as second and third arguments."
 fi
 if [[ "$2" == "" ]]; then
 	echo "You must specify a GitHub username"

challenge_0/coffeescript/kedarbramhe/coffeescripts/hello_world.coffee

@@ -0,0 +1 @@
+console.log "hello world"

challenge_0/coffeescript/kedarbramhe/coffeescripts/readme.md

@@ -0,0 +1,16 @@
+##Install
+To install, first make sure you have a working copy of the latest stable version of Node.js. You can then install CoffeeScript globally with npm:
+
+`npm install -g coffee-script`
+
+##Usage
+To compile this file command used is
+
+`coffee -o javascripts/ -c coffeescripts/`
+
+Option -c means to compile and -o means the output folder.The ordering should always be output then compile.
+
+To run the compiled file simply run the compiled .js file with node
+for example
+
+`node hello_world.js`

challenge_0/csharp/bdoner/README.md

@@ -0,0 +1,3 @@
+## Hello
+
+To compile run `csc.exe hello.cs` and run the resulting file `hello.exe`.

challenge_0/csharp/bdoner/hello.cs

@@ -0,0 +1,7 @@
+using System;
+
+public class Hello {
+    static void Main() {
+        Console.WriteLine("Hello, world!");
+    }
+}

challenge_0/go/makernaren/README.md

@@ -0,0 +1,8 @@
+## Hello world!
+#### To run the code : 
+* Install [golgang](https://golang.org/doc/install)
+* Open this directory in terminal and run `go run helloworld.go` to compile and run the code.
+```
+$ go run helloworld.go
+Hello World!
+```

challenge_0/go/makernaren/helloworld.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println("Hello World!")
+}

challenge_0/go/natdm/app.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"log"
+)
+
+func main() {
+	log.Println("hello world")
+}

challenge_0/julia/DTCitron/README.md

@@ -0,0 +1,10 @@
+#Hello World
+
+##Premise
+
+-	Hello and welcome to our little community! We're glad to have you!
+-	Your first task is to implement a simple Hello World program in the language of your choice. Happy coding!
+
+##Implementation
+
+- Call `julia helloworld.jl' in the `src' directory

challenge_0/julia/DTCitron/src/helloworld.jl

@@ -0,0 +1 @@
+println("Hello World!")

challenge_0/python/DTCitron/README.md

@@ -0,0 +1,10 @@
+#Hello World
+
+##Premise
+
+-	Hello and welcome to our little community! We're glad to have you!
+-	Your first task is to implement a simple Hello World program in the language of your choice. Happy coding!
+
+##Implementation
+
+- Call `python main.py' from the `src' directory

challenge_0/python/DTCitron/src/main.py

@@ -0,0 +1,5 @@
+def main():
+    print 'Hello World!'
+
+if __name__=='__main__':
+    main()

challenge_0/python/bryantpq/README.md

@@ -0,0 +1,4 @@
+# Challenge 0
+FILES:
+1 . hello.py
+Prints hello world to the console

challenge_0/python/bryantpq/hello.py

@@ -0,0 +1 @@
+print('Hello World!')

challenge_0/python/tavery321/README.md

@@ -0,0 +1 @@
+A program written in python which prints "Hello World"

challenge_0/python/tavery321/src/c0.py

@@ -0,0 +1,2 @@
+print("Hello World")
+

challenge_0/python/walkingluo/README.md

@@ -0,0 +1,3 @@
+## Challenge_0
+
+- Print Hello World

challenge_0/python/walkingluo/src/hello_world.py

@@ -0,0 +1,11 @@
+#
+# Print Hello World
+#
+
+
+def print_hello_world():
+    print("Hello World")
+
+
+if __name__ == '__main__':
+    print_hello_world()

challenge_0/rust/makernaren/Cargo.toml

@@ -0,0 +1,5 @@
+[package]
+
+name = "hello_world"
+version = "0.0.1"
+authors = [ "naren <makernaren@gmail.com>" ]

challenge_0/rust/makernaren/README.md

@@ -0,0 +1,8 @@
+## Hello world!
+#### To run the code : 
+* Install [rustlang](https://www.rust-lang.org/en-US/install.html)
+* Open this directory in terminal and run `cargo run` to compile and run the code.
+```
+$ cargo run
+Hello, world!
+```

challenge_0/rust/makernaren/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

challenge_1/c/scottsquatch/README.md

@@ -1,6 +1,5 @@
 # Reverse a String
 Application which reverses a string.
-
 ## Building
 ``` bash
 make

challenge_1/c/scottsquatch/src/main.c

@@ -1,21 +1,22 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#include <stdbool.h>
 
 /* Constants */
 #define RETURN_SUCCESS 0
 #define MAX_SIZE 256
+#define TRUE 0
+#define FALSE -1
 
 /* Function Declarations */
-char* reverse(char* originalString);
-bool shouldContinue(char contineChar);
+void reverse(char* originalString);
+int should_continue(char contineChar);
+void swap(char*, int, int);
 
 int main()
 {
   char stringToReverse[MAX_SIZE];
   char continueResult;
-  char* reversedString = NULL;
 
   do
   {
@@ -24,48 +25,55 @@ int main()
     scanf("%s", stringToReverse);
 
     // Print result
-    reversedString = reverse(stringToReverse);
-    printf("Reversed String: %s\n", reversedString);
+    reverse(stringToReverse);
+    printf("Reversed String: %s\n", stringToReverse);
 
     // See if we should continue
     printf("Would you like to continue (y to continue): ");
     scanf(" %c", &continueResult);
 
-  } while(shouldContinue(continueResult));
-
-  // free up memory
-  free(reversedString);
+  } while(should_continue(continueResult) == TRUE);
 
   return RETURN_SUCCESS;
 }
 
 // Reverse a given string.
-char* reverse(char* originalString)
+void reverse(char* originalString)
 {
-  // Variables
-  int length;
-  char* reversedString = NULL;
-  int i;
-  int reversedIndex;
-
   if (originalString != NULL)
   {
-    length = strlen(originalString);
-    reversedString = calloc(length, sizeof(char));
-    reversedIndex = 0;
+    int length = strlen(originalString);
+    int backIdx = length - 1;
+    // Calculate number of loops here so that we don't have to keep recomputing.
+    // swapping front and back pointers so only iterate over half of length
+    int numLoops = length / 2;
 
-    // Iterate over Original String in Reverse
-    for (i = length - 1; i >= 0; i--)
+    // iterate over half of the string, swapping front and back pointers
+    for (int frontIdx = 0; frontIdx < numLoops; frontIdx++)
     {
-      reversedString[reversedIndex++] = originalString[i];
+      // Swap back and front to reverse string.
+      swap(originalString, frontIdx, backIdx--);
     }
   }
+}
 
-  return reversedString;
+// Swap characters of a character array
+void swap(char* string, int firstIndex, int secondIndex)
+{
+  char temp = string[firstIndex];
+  string[firstIndex] = string[secondIndex];
+  string[secondIndex] = temp;
 }
 
 // Return true if we are to continue loop
-bool shouldContinue(char contineChar)
+int should_continue(char contineChar)
 {
-  return contineChar == 'y' || contineChar == 'Y';
+  if (contineChar == 'y' || contineChar == 'Y')
+  {
+    return TRUE;
+  }
+  else
+  {
+    return FALSE;
+  }
 }

challenge_1/c/woser/README.md

@@ -0,0 +1,8 @@
+# Reverse a string
+Application for string reversal.
+
+## Compile and Run
+$gcc string_reverse.c -o 'output.exe' && ./'outputfile'
+
+## Explanation
+Takes string as in-code input and reverses it using two pointers, printing reversed string on console.

challenge_1/c/woser/src/string_reverse.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <string.h>
+
+void string_reverse(char* string){
+	char* start = string;
+	char* end = start + strlen(string) - 1;
+	char tmp;
+
+	while (end > start){
+		tmp = *start;
+		*start = *end;
+		*end = tmp;
+
+		++start;
+		--end;
+	}
+}
+
+int main(void){
+	char string[] = "Hello!";
+	string_reverse(string);
+	printf("%s\n", string);
+	return 0;
+}

challenge_1/coffeescript/kedarbramhe/coffeescripts/readme.md

@@ -0,0 +1,16 @@
+##Install
+To install, first make sure you have a working copy of the latest stable version of Node.js. You can then install CoffeeScript globally with npm:
+
+`npm install -g coffee-script`
+
+##Usage
+To compile this file command used is
+
+`coffee -o javascripts/ -c coffeescripts/`
+
+Option -c means to compile and -o means the output folder.The ordering should always be output then compile.
+
+To run the compiled file simply run the compiled .js file with node
+for example
+
+`node hello_world.js`

challenge_1/coffeescript/kedarbramhe/coffeescripts/reverse.coffee

@@ -0,0 +1,5 @@
+reverse = (s) ->
+  if s.length < 2 then s else reverse(s[1..-1]) + s[0]
+
+s = "HelloWorld"
+console.log "s=#{s}, s.reverse=#{reverse(s)}"

challenge_1/cpp/chowey/main.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+#include <string>
+
+int main() {
+    std::string input;
+    std::cout << "Enter a string to be reversed:" << std::endl;
+    std::getline(std::cin,input);
+
+    int length = input.length();
+
+    for(int i = 1; i <= length; i++) {
+        std::cout << input[length-i];
+    }
+    std::cout << std::endl;
+
+    return 0;
+}