Make 09 tests pass

09_palindromes/palindromes.js

@@ -1,6 +1,9 @@
-const palindromes = function () {
+const palindromes = function (string) {
+  string = string.replace(/[^A-Za-z0-9]/g, '').toLowerCase()
+  const reversed = Array.from(string).reverse().reduce((res, cur) => res + cur)
 
-};
+  return string === reversed
+}
 
 // Do not edit below this line
-module.exports = palindromes;
+module.exports = palindromes

09_palindromes/palindromes.spec.js

@@ -2,27 +2,28 @@ const palindromes = require('./palindromes')
 
 describe('palindromes', () => {
   test('works with single words', () => {
-    expect(palindromes('racecar')).toBe(true);
-  });
-  test.skip('works with punctuation ', () => {
-    expect(palindromes('racecar!')).toBe(true);
-  });
-  test.skip('works with upper-case letters ', () => {
-    expect(palindromes('Racecar!')).toBe(true);
-  });
-  test.skip('works with multiple words', () => {
-    expect(palindromes('A car, a man, a maraca.')).toBe(true);
-  });
-  test.skip('works with multiple words', () => {
-    expect(palindromes('Animal loots foliated detail of stool lamina.')).toBe(true);
-  });
-  test.skip('doesn\'t just always return true', () => {
-    expect(palindromes('ZZZZ car, a man, a maracaz.')).toBe(false);
-  });
-  test.skip('works with numbers in a string', () => {
-    expect(palindromes('rac3e3car')).toBe(true);
-  });
-  test.skip('works with unevenly spaced numbers in a string', () => {
-    expect(palindromes('r3ace3car')).toBe(false);
-  });
-});
+    expect(palindromes('racecar')).toBe(true)
+  })
+  test('works with punctuation ', () => {
+    expect(palindromes('racecar!')).toBe(true)
+  })
+  test('works with upper-case letters ', () => {
+    expect(palindromes('Racecar!')).toBe(true)
+  })
+  test('works with multiple words', () => {
+    expect(palindromes('A car, a man, a maraca.')).toBe(true)
+  })
+  test('works with multiple words', () => {
+    expect(palindromes('Animal loots foliated detail of stool lamina.'))
+      .toBe(true)
+  })
+  test('doesn\'t just always return true', () => {
+    expect(palindromes('ZZZZ car, a man, a maracaz.')).toBe(false)
+  })
+  test('works with numbers in a string', () => {
+    expect(palindromes('rac3e3car')).toBe(true)
+  })
+  test('works with unevenly spaced numbers in a string', () => {
+    expect(palindromes('r3ace3car')).toBe(false)
+  })
+})