Revert "remove class based exercises"

This reverts commit 290e7f1da4.

repeatString/README.md

@@ -1,4 +1,4 @@
-# Exercis 02 - repeatString
+# Exercise 02 - repeatString
 
 Write a function that simply repeats the string a given number of times:
 

repeatString/repeatString.js

@@ -1,10 +1,5 @@
-var repeatString = function(string, num) {
-  if (num < 0) return 'ERROR'
-  let returnValue = ''
-  for(let i = 0; i < num; i++) {
-    returnValue = returnValue + string
-  } 
-  return returnValue
+var repeatString = function() {
+
 }
 
 module.exports = repeatString

repeatString/repeatString.spec.js

@@ -4,16 +4,16 @@ describe('repeatString', function() {
   it('repeats the string', function() {
     expect(repeatString('hey', 3)).toEqual('heyheyhey');
   });
-  it('repeats the string many times', function() {
+  xit('repeats the string many times', function() {
     expect(repeatString('hey', 10)).toEqual('heyheyheyheyheyheyheyheyheyhey');
   });
-  it('repeats the string 1 times', function() {
+  xit('repeats the string 1 times', function() {
     expect(repeatString('hey', 1)).toEqual('hey');
   });
-  it('repeats the string 0 times', function() {
+  xit('repeats the string 0 times', function() {
     expect(repeatString('hey', 0)).toEqual('');
   });
-  it('returns ERROR with negative numbers', function() {
+  xit('returns ERROR with negative numbers', function() {
     expect(repeatString('hey', -1)).toEqual('ERROR');
   });
 });