Nick Satinover: StrangerStrings

basicMath/MathUtilities.js

@@ -2,19 +2,19 @@ class MathUtilities {
 
 
     add(baseValue, valueToAdd){
-        return -1;
+        return baseValue + valueToAdd;
     }
 
     subtract(baseValue, valueToAdd){
-        return -1;
+        return baseValue - valueToAdd;
     }
 
     divide(baseValue, valueToAdd){
-        return -1;
+        return baseValue / valueToAdd;
     }
 
     multiply(baseValue, valueToAdd){
-        return -1;
+        return baseValue * valueToAdd;
     }
 }
 

basicMath/MathUtilities.test.js

@@ -74,7 +74,7 @@ test("Test 2 Integer Division", () => {
     let addedValue = 1;
 
     // When
-    let expected = 127;
+    let expected = 2;
     let actual = math.divide(baseValue, addedValue);
     //Then
     expect(actual).toEqual(expected);

strangerStrings/StrangerStrings.js

@@ -1,35 +1,39 @@
 class StrangerStrings {
 
     getHelloWorld(){
-        return null;
+        return "Hello World";
     }
 
     concatenation(firstSegment, secondSegment){
-        return null;
+        return firstSegment.concat(secondSegment);
     }
 
     getPrefix(input){
-        return null;
+        return input.substring( 0, (input.length / 2) );
     }
 
     getSuffix(input){
-        return null;
+        return input.substring( (input.length / 2), ( input.length));
     }
 
     getMiddleCharacter(input){
-        return null;
+        return input[ 
+            input.length % 2 == 0 ? ( input.length / 2 ) : ( (input.length - 1) / 2 ) 
+        ];
     }
 
     getFirstWord(input){
-        return null;
+        const arr = input.split(' ');
+        return arr[0];
     }
 
-    getSecondWord(spaceDelimnatedInput){
-        return null;
+    getSecondWord(spaceDeliminatedInput){
+        const arr = spaceDeliminatedInput.split(' ');
+        return arr[1];
     }
 
     reverse(input){
-        return null;
+        return input.split('').reverse().join('');
     }
 }
 

strangerStrings/StrangerStrings.test.js

@@ -67,7 +67,7 @@ test("return the middle character of `inputValue`", () => {
 
 
     // When
-    let actual = strangerStrings.getMiddleCharacter(input);
+    let actual = strangerStrings.getMiddleCharacter(inputValue);
     //Then
     expect(actual).toEqual(expected);
 });