eduairet · March 31, 2021 21:11 · Mar 31, 2021 · Mar 30, 2021 · Mar 30, 2021
diff --git a/creditCardValidator.js b/creditCardValidator.js
@@ -31,7 +31,7 @@ function validateCred(array) {
   let validationArray = [];
 
   let counter = 0;
-  for (digit of revArr) {
+  for (const digit of revArr) {
     if (digit < 10 && digit >= 0) {
 
       if (counter % 2 !== 0) {
@@ -75,6 +75,6 @@ function validateCred(array) {
 
 }
 
-for (card of batch) {
+for (const card of batch) {
   validateCred(card);
 }
diff --git a/creditCardValidator.js b/creditCardValidator.js
@@ -0,0 +1,80 @@
+// Codecademy Credit Card Number exercise by Eduardo Aire Torres
+
+// All valid credit card numbers
+const valid1 = [4, 5, 3, 9, 6, 7, 7, 9, 0, 8, 0, 1, 6, 8, 0, 8];
+const valid2 = [5, 5, 3, 5, 7, 6, 6, 7, 6, 8, 7, 5, 1, 4, 3, 9];
+const valid3 = [3, 7, 1, 6, 1, 2, 0, 1, 9, 9, 8, 5, 2, 3, 6];
+const valid4 = [6, 0, 1, 1, 1, 4, 4, 3, 4, 0, 6, 8, 2, 9, 0, 5];
+const valid5 = [4, 5, 3, 9, 4, 0, 4, 9, 6, 7, 8, 6, 9, 6, 6, 6];
+
+// All invalid credit card numbers
+const invalid1 = [4, 5, 3, 2, 7, 7, 8, 7, 7, 1, 0, 9, 1, 7, 9, 5];
+const invalid2 = [5, 7, 9, 5, 5, 9, 3, 3, 9, 2, 1, 3, 4, 6, 4, 3];
+const invalid3 = [3, 7, 5, 7, 9, 6, 0, 8, 4, 4, 5, 9, 9, 1, 4];
+const invalid4 = [6, 0, 1, 1, 1, 2, 7, 9, 6, 1, 7, 7, 7, 9, 3, 5];
+const invalid5 = [5, 3, 8, 2, 0, 1, 9, 7, 7, 2, 8, 8, 3, 8, 5, 4];
+
+// Can be either valid or invalid
+const mystery1 = [3, 4, 4, 8, 0, 1, 9, 6, 8, 3, 0, 5, 4, 1, 4];
+const mystery2 = [5, 4, 6, 6, 1, 0, 0, 8, 6, 1, 6, 2, 0, 2, 3, 9];
+const mystery3 = [6, 0, 1, 1, 3, 7, 7, 0, 2, 0, 9, 6, 2, 6, 5, 6, 2, 0, 3];
+const mystery4 = [4, 9, 2, 9, 8, 7, 7, 1, 6, 9, 2, 1, 7, 0, 9, 3];
+const mystery5 = [4, 9, 1, 3, 5, 4, 0, 4, 6, 3, 0, 7, 2, 5, 2, 3];
+
+// An array of all the arrays above
+const batch = [valid1, valid2, valid3, valid4, valid5, invalid1, invalid2, invalid3, invalid4, invalid5, mystery1, mystery2, mystery3, mystery4, mystery5];
+
+// Add your functions below:
+function validateCred(array) {
+
+  const revArr = array.reverse();
+  let validationArray = [];
+
+  let counter = 0;
+  for (digit of revArr) {
+    if (digit < 10 && digit >= 0) {
+
+      if (counter % 2 !== 0) {
+        if (digit * 2 >= 10) {
+          validationArray.push(digit * 2 - 9);
+        } else {
+          validationArray.push(digit * 2);
+        }
+      } else {
+        validationArray.push(digit);
+      }
+
+    } else {
+      console.log('Every digit must be above, equal to 0 or bellow 10');
+    }
+    counter += 1
+  }
+
+  //console.log(validationArray);
+  const reducer = (accumulator, currentValue) => accumulator + currentValue;
+  validationArray = validationArray.reduce(reducer);
+
+  let company;
+  if (array[0] === 3) {
+    company = 'Amex';
+  } else if (array[0] === 4) {
+    company = 'Visa';
+  } else if (array[0] === 5) {
+    company = 'Mastercard';
+  } else if (array[0] === 6) {
+    company = 'Discover';
+  } else {
+    company = 'Not Found';
+  }
+
+  if (validationArray % 10 === 0) {
+    console.log(`Valid ${company}`);
+  } else {
+    console.log('Invalid');
+  }
+
+}
+
+for (card of batch) {
+  validateCred(card);
+}