password validator

Author: asandagwala

Sprint-3/3-dead-code/exercise-1.js

@@ -5,9 +5,6 @@ let testName = "Jerry";
 const greeting = "hello";
 
 function sayHello(greeting, name) {
-  const greetingStr = greeting + ", " + name + "!";
-  return `${greeting}, ${name}!`;
-  console.log(greetingStr);
 }
 
 testName = "Aman";

Sprint-3/3-dead-code/exercise-2.js

@@ -2,13 +2,8 @@
 // The countAndCapitalisePets function should continue to work for any reasonable input it's given, and you shouldn't modify the pets variable.
 
 const pets = ["parrot", "hamster", "horse", "dog", "hamster", "cat", "hamster"];
-const capitalisedPets = pets.map((pet) => pet.toUpperCase());
 const petsStartingWithH = pets.filter((pet) => pet[0] === "h");
 
-function logPets(petsArr) {
-  petsArr.forEach((pet) => console.log(pet));
-}
-
 function countAndCapitalisePets(petsArr) {
   const petCount = {};
 

Sprint-3/4-stretch/find.js

@@ -20,6 +20,20 @@ console.log(find("code your future", "z"));
 // Pay particular attention to the following:
 
 // a) How the index variable updates during the call to find
+// It always starts at 0, the first letter of the string. On each loop 
+// iteration that doesn't find a match, index++ runs, increasing its value by 1
+
 // b) What is the if statement used to check
+// If it evaluates to true, it stops the 
+// entire function immediately and hands back that position number.
+
 // c) Why is index++ being used?
+// It forces the loop to move to the next letter in the string for the next round. 
+// Without it, the loop would look at index 0 over and over again and increasing 
+// the index in every single turn makes sure that the loop with eventually 
+// be equal to the length of the string and come to an end.
+
 // d) What is the condition index < str.length used for?
+// This condition is a safety guardrail that defines the lifetime of the loop. 
+// It basically tells the loop to  keep looping as long as 
+// we haven't run out of letters to look at

Sprint-3/4-stretch/password-validator.js

@@ -1,5 +1,37 @@
-function passwordValidator(password) {
-    return password.length < 5 ? false : true
+function passwordValidator(password, passwordsHistory) {
+  if (password.length < 5) {
+    return false;
+  }
+  if (passwordsHistory && passwordsHistory.includes(password)) {
+    return false;
+  }
+  let hasUppercase = false;
+  let hasLowercase = false;
+  let hasNumber = false;
+  let hasSymbol = false;
+
+  const specialSymbols = "!#$%*&.";
+  for (let i = 0; i < password.length; i++) {
+    const char = password[i];
+
+    if (char >= "0" && char <= "9") {
+      hasNumber = true;
+    } else if (specialSymbols.includes(char)) {
+
+      hasSymbol = true;
+    } else if (char === char.toUpperCase() && char !== char.toLowerCase()) {
+      hasUppercase = true;
+      
+    } else if (char === char.toLowerCase() && char !== char.toUpperCase()) {
+      hasLowercase = true;
+    }
+  }
+
+  if (hasUppercase && hasLowercase && hasNumber && hasSymbol) {
+    return true;
+  } else {
+    return false;
+  }
 }