exercise stubs - part 1 of 4 (#284)

[no important files changed]

Author: keiravillekode

exercises/practice/armstrong-numbers/source/armstrong_numbers.d

@@ -1,5 +1,10 @@
 module armstrong_numbers;
 
+pure bool isArmstrongNumber(immutable int number)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/bob/source/bob.d

@@ -1,5 +1,10 @@
 module bob;
 
+pure string hey(immutable string text)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/collatz-conjecture/source/collatz_conjecture.d

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

exercises/practice/darts/source/darts.d

@@ -1,5 +1,10 @@
 module darts;
 
+pure int score(immutable float x, immutable float y)
+{
+    // implement this function
+}
+
 unittest
 {
     immutable int allTestsEnabled = 0;

exercises/practice/etl/source/etl.d

@@ -4,6 +4,11 @@ import std.array : array;
 import std.algorithm.sorting : sort;
 import std.algorithm.comparison : equal;
 
+pure int[dchar] transform(immutable string[int] score_map)
+{
+    // implement this function
+}
+
 unittest
 {
 

exercises/practice/grains/source/grains.d

@@ -1,5 +1,15 @@
 module grains;
 
+pure ulong square(immutable ulong num)
+{
+    // implement this function
+}
+
+pure ulong total()
+{
+    // implement this function
+}
+
 unittest
 {
     import std.exception : assertThrown;