London10-Afsha-Hossain-JS1-Week4

1-exercises/A-array-find/exercise.js

@@ -3,8 +3,11 @@
   Using .find(), we'd like to find the first name which starts with A and is longer than 7 letters.
 */
 
+// we are using function with a parameter that is an array of string
+
 // write your code here
 
+
 let names = [
   "Rakesh",
   "Antonio",
@@ -17,9 +20,46 @@ let names = [
   "Ahmed",
 ];
 
+function isLongName(singleName) {
+  return singleName.length > 7;
+}
+
+let longName = names.find(isLongName);
+
+function isStartingWithA(singleName) {
+  return singleName[0] === "A";
+}
+
+let nameStartingWithA = names.find(isStartingWithA);
+
+function findLongNameThatStartsWithA(names) {
+  return nameStartingWithA && longName;
+
+}
+
 let longNameThatStartsWithA = findLongNameThatStartsWithA(names);
 
+
 console.log(longNameThatStartsWithA);
 
 /* EXPECTED OUTPUT */
 // "Alexandra"
+
+
+// function findLongName(names) {
+//   let longName = [];
+//   if (names.length > 7) {
+//     longName.push(names);
+//   }
+//   return longName;
+// }
+
+// function findLongNameThatStartsWithA(string){
+//   let LongNameStartingWithA = [];
+//   for (let letter of string) {
+//     if (findLongName(string) && letter[0] === "A") {
+//       LongNameStartingWithA.push(string)
+//     }
+//   }
+//   return LongNameStartingWithA
+// }

1-exercises/B-array-some/exercise.js

@@ -15,10 +15,14 @@ let pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 
+for (let eachPair of pairsByIndex) {
+  if (eachPair === null) {
+    return process.exit(1);
+  };
+};
 let pairs = pairsByIndex.map(function (indexes) {
   let student = students[indexes[0]];
   let mentor = mentors[indexes[1]];
   return [student, mentor];
 });
-
 console.log(pairs);

1-exercises/C-array-every/exercise.js

@@ -5,7 +5,11 @@
 let students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 let group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-let groupIsOnlyStudents; // complete this statement
+let groupIsOnlyStudents = group.every(isOnlyStudent); // complete this statement
+
+function isOnlyStudent(list) {
+  return list.includes(students);
+}
 
 if (groupIsOnlyStudents) {
   console.log("The group contains only students");
@@ -16,3 +20,4 @@ if (groupIsOnlyStudents) {
 /* EXPECTED RESULT */
 
 // The group does not contain only students
+

1-exercises/D-array-filter/exercise.js

@@ -8,7 +8,7 @@
 
 let pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-let pairsByIndex; // Complete this statement
+let pairsByIndex = pairsByIndexRaw.filter((pair) => Array.isArray(pair) && pair.length === 2); // Complete this statement
 
 let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];

1-exercises/E-array-map/exercise.js

@@ -3,7 +3,7 @@
 
 let numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
-let numbersMultipliedByOneHundred; // complete this statement
+let numbersMultipliedByOneHundred = numbers.map(number => number * 100); // complete this statement
 
 console.log(numbersMultipliedByOneHundred);
 

1-exercises/F-array-forEach/README.md

@@ -36,9 +36,10 @@ However, it is good practise to write small functions with a single responsibili
 
 ```js
 function formatName(name) {
-  return name.split("")[0].toUpperCase() + name.slice(1);
+  return name.split(" ")[0].toUpperCase() + name.slice(1);
 }
 
+
 names.map(formatName).forEach(function(name, index) {
   console.log(index + ": " + name);
 });

1-exercises/F-array-forEach/exercise.js

@@ -9,6 +9,19 @@
 
 let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
+arr.forEach(function replaceWithFizzBuzz(number) {
+  if (number % 3 === 0 && number % 5 === 0) {
+      console.log("FizzBuzz");
+  } else if (number % 3 === 0) {
+    console.log("Fizz");
+    } else if (number % 5 === 0) {
+      console.log("Buzz"); 
+    } else console.log(number);
+  }
+);
+
+
+
 /* EXPECTED OUTPUT */
 
 /*

1-exercises/G-array-methods/exercise.js

@@ -4,7 +4,7 @@
 */
 
 let numbers = [3, 2, 1];
-let sortedNumbers; // complete this statement
+let sortedNumbers = numbers.sort(); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/G-array-methods/exercise2.js

@@ -7,7 +7,9 @@
 let mentors = ["Daniel", "Irina", "Rares"];
 let students = ["Rukmini", "Abdul", "Austine", "Swathi"];
 
-let everyone; // complete this statement
+
+let everyone = mentors.concat(students); // complete this statement
+// let everyone = [...mentors, ...students]; // alternate solution
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise.js

@@ -15,8 +15,8 @@ let everyone = [
   "Swathi",
 ];
 
-let firstFive; // complete this statement
-let lastFive; // complete this statement
+let firstFive = everyone.slice(0, 5); // complete this statement
+let lastFive = everyone.slice(2, 7); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise2.js

@@ -5,9 +5,30 @@
   It should return a string with the first letter in uppercase
   For example, capitailise("hello") should return "Hello"
   Tip: use the string method .split() and the array method .join()
+
+  we can split the string into an array
+  ['d','a','n','i','e','l']
+
+  what array method can we use to change the first letter to a capital?
+
+  let newArr = arr.map(function (currentValue, index) {
+  if (index === 0) {
+    return currentValue.toUpperCase();
+  }
+  return currentValue
+});
+
 */
 
-function capitalise(str) {}
+function capitalise(str) {
+  let newArray = [];
+  newArray = str.split("");
+  newArray[0] = newArray[0].toUpperCase();
+  return newArray.join("");
+  // return str.split("")[0].toUpperCase() + str.slice(1);
+}
+
+
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise3.js

@@ -7,7 +7,7 @@
 let ukNations = ["Scotland", "Wales", "England", "Northern Ireland"];
 
 function isInUK(country) {
-  return; // complete this statement
+  return ukNations.includes(country); // complete this statement
 }
 
 /* 

1-exercises/I-string-replace/exercise.js

@@ -13,7 +13,8 @@
 let story =
   "I like dogs. One day I went to the park and I saw 10 dogs. It was a great day.";
 
-let result = story.replace("", "");
+let result =
+  story.replace("dogs", "cats").replace("day", "night").replace("10", "100000").replace("dogs", "cats").replace("great", "brilliant").replace("day", "night");
 
 /* EXPECTED OUTPUT */
 

1-exercises/J-string-substring/exercise.js

@@ -6,7 +6,7 @@
 
 let statement = "I like programming and dogs";
 
-statement = statement.substring();
+statement = statement.substring(0, 19);
 
 console.log(statement);
 

1-exercises/J-string-substring/exercise2.js

@@ -14,11 +14,11 @@ let names = [
   "Arron Graham",
 ];
 
-names[0] = names[0].substring();
-names[1] = names[1].substring();
-names[2] = names[2].substring();
-names[3] = names[3].substring();
-names[4] = names[4].substring();
+names[0] = names[0].substring(0, 6);
+names[1] = names[1].substring(0, 7);
+names[2] = names[2].substring(0, 4);
+names[3] = names[3].substring(0, 4);
+names[4] = names[4].substring(0, 5);
 
 names.forEach((name) => {
   console.log(name);

1-exercises/J-string-substring/exercise3.js

@@ -8,7 +8,7 @@
 
 let statement = "I do not like programming";
 
-let result = "";
+let result = statement.substring(0, 5) + statement.substring(9, statement.length);
 
 console.log(result);
 

2-mandatory/1-create-functions.js

@@ -3,15 +3,17 @@ Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the first five elements of the passed array.
 */
-function first5() {
+function first5(arrayOfItems) {
+  return arrayOfItems.slice(0, 5);
 }
 
 /*
 Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the same elements, except sorted.
 */
-function sortArray() {
+function sortArray(arrayOfItems) {
+  return Array.from(arrayOfItems).sort();
 }
 
 /*
@@ -24,7 +26,11 @@ Write a function that:
 - Removes any forward slashes (/) in the strings.
 - Makes the strings all lowercase.
 */
-function tidyUpString() {
+function tidyUpString(arrayOfStrings) {
+  for (const singleString of arrayOfStrings) {
+    console.log(singleString.trim());
+  }
+  return singleString.trim().replace("/","").toLowerCase();
 }
 
 /*
@@ -45,6 +51,7 @@ Write a function that:
 */
 
 function formatPercentage() {
+
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

2-mandatory/5-eligible-students.js

@@ -7,7 +7,14 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function getEligibleStudents() {}
+function findName(studentArray) {
+  let filterArray = studentArray.filter((element) => {(element[1] >= 8) {
+      return element[0];
+    }
+  });
+  // let modifyArray = filterArray.map(element => element[0])
+  // return modifyArray
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/7-lane-names.js

@@ -6,7 +6,15 @@
   HINT: string and array methods that could be helpful (indexOf, filter)
 */
 
-function getLanes() {}
+let laneNames = [];
+
+
+function getLanes(roadNames) {
+  if (roadNames.includes("Lane")) {
+    laneNames.push(roadNames);
+  }
+  return laneNames;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/8-password-validator.js

@@ -23,7 +23,20 @@ PasswordValidationResult=  [false, false, false, false, true]
 
 */
 
-function validatePasswords(passwords) {}
+function validatePasswords(passwords) {
+  return passwords.map(
+    (element, i, arr) =>
+      element.length >= 5 &&
+      containsLowercaseLetter(element) &&
+      containsNumber(element) &&
+      containsUppercaseLetter(element) &&
+      containsSymbol(element) &&
+      arr.indexOf(element) === i
+  );
+}
+
+
+
 
 // Returns true if string contains at least one uppercase letter.
 function containsUppercaseLetter(string) {