exercise stubs - part 2 of 4 (#285)

[no important files changed]

Author: keiravillekode

exercises/practice/hamming/source/hamming.d

@@ -1,5 +1,10 @@
 module hamming;
 
+pure int distance(immutable string lhs, immutable string rhs)
+{
+    // implement this function
+}
+
 unittest
 {
     import std.exception : assertThrown;

exercises/practice/isogram/source/isogram.d

@@ -1,5 +1,10 @@
 module isogram;
 
+pure bool isIsogram(immutable string phrase)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/luhn/source/luhn.d

@@ -1,5 +1,10 @@
 module luhn;
 
+pure bool valid(immutable string input)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/matching-brackets/source/matching_brackets.d

@@ -1,5 +1,10 @@
 module matching_brackets;
 
+pure bool isPaired(immutable string input)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/nth-prime/source/nth_prime.d

@@ -1,5 +1,10 @@
 module nth_prime;
 
+pure int prime(immutable int number)
+{
+    // implement this function
+}
+
 unittest
 {
     import std.exception : assertThrown;

exercises/practice/pangram/source/pangram.d

@@ -1,5 +1,10 @@
 module pangram;
 
+pure bool isPangram(immutable string str)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/perfect-numbers/source/perfect_numbers.d

@@ -7,6 +7,11 @@ enum Classification
     ABUNDANT
 }
 
+pure Classification classify(immutable int input)
+{
+    // implement this function
+}
+
 unittest
 {
     import std.exception : assertThrown;

exercises/practice/prime-factors/source/prime_factors.d

@@ -1,5 +1,10 @@
 module prime_factors;
 
+pure int[] factors(immutable long value)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;