solves exercise ironhack-labs#3 Bonus

Author: JohannaXX

src/functions-and-arrays.js

@@ -33,7 +33,24 @@ function sumNumbers(numbers) {
 }
 
 //Iteration #3 Bonus: Calculate the sum of array elements
-
+function sum(elements) {
+  let result = 0;
+  elements.forEach( function(item) {
+    switch(typeof item) {
+      case 'string':
+        result += item.length;
+        break;
+      case 'number':
+      case 'boolean':
+        result += Number(item);
+        break;
+      case 'object':
+      case 'array':
+        throw new Error("Unsupported data type sir or ma'am");
+    }
+  });
+  return result;
+}
 
 // Iteration #4: Calculate the average
 // Level 1: Array of numbers

tests/functions-and-arrays.spec.js

@@ -81,46 +81,46 @@ describe('Calculate the sum of array of numbers', () => {
   });
 });
 
-// describe('Bonus: Calculate the sum', () => {
-//   it('should create a function named sum', () => {
-//     expect(typeof sum).toBe('function');
-//   });
+describe('Bonus: Calculate the sum', () => {
+  it('should create a function named sum', () => {
+    expect(typeof sum).toBe('function');
+  });
 
-//   it('should return zero if receives an empty array when called', () => {
-//     expect(sum([])).toBe(0);
-//   });
+  it('should return zero if receives an empty array when called', () => {
+    expect(sum([])).toBe(0);
+  });
 
-//   it('should return the sum with one number array', () => {
-//     expect(sum([4])).toBe(4);
-//   });
+  it('should return the sum with one number array', () => {
+    expect(sum([4])).toBe(4);
+  });
 
-//   it('should return zero if all elements are zero', () => {
-//     expect(sum([0, 0, 0, 0, 0])).toBe(0);
-//   });
+  it('should return zero if all elements are zero', () => {
+    expect(sum([0, 0, 0, 0, 0])).toBe(0);
+  });
 
-//   it('should return the sum when passed array of numbers', () => {
-//     expect(sum([10, 5, 4, 32, 8])).toBe(59);
-//   });
+  it('should return the sum when passed array of numbers', () => {
+    expect(sum([10, 5, 4, 32, 8])).toBe(59);
+  });
 
-//   it('should return the sum when passed array of strings', () => {
-//     expect(sum(['ana', 'marco', 'nicolas', 'tania', 'ptwd'])).toBe(24);
-//   });
+  it('should return the sum when passed array of strings', () => {
+    expect(sum(['ana', 'marco', 'nicolas', 'tania', 'ptwd'])).toBe(24);
+  });
 
-//   it('should return the sum when passed array of mixed strings and numbers - ', () => {
-//     expect(sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, 10])).toBe(56);
-//   });
-//   it('should return the sum when passed array of mixed strings, numbers and booleans - ', () => {
-//     // false is counted as 0
-//     expect(sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, false])).toBe(46);
-//     // true is counted as 1
-//     expect(sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, true])).toBe(47);
-//   });
-//   it('should throw an error when unsupported data type (object or array) present in the array', () => {
-//     expect(() => sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, [], {}])).toThrow(
-//       new Error("Unsupported data type sir or ma'am")
-//     );
-//   });
-// });
+  it('should return the sum when passed array of mixed strings and numbers - ', () => {
+    expect(sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, 10])).toBe(56);
+  });
+  it('should return the sum when passed array of mixed strings, numbers and booleans - ', () => {
+    // false is counted as 0
+    expect(sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, false])).toBe(46);
+    // true is counted as 1
+    expect(sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, true])).toBe(47);
+  });
+  it('should throw an error when unsupported data type (object or array) present in the array', () => {
+    expect(() => sum([6, 12, 'miami', 1, 'barca', '200', 'lisboa', 8, [], {}])).toThrow(
+      new Error("Unsupported data type sir or ma'am")
+    );
+  });
+});
 
 describe('Calculate the average of an array of numbers', () => {
   it('should create a function named averageNumbers', () => {