Ana araujo

assignments/array-methods.js

@@ -56,30 +56,97 @@ const runners = [
 ];
 
 // ==== Challenge 1: Use .forEach() ====
-// The event director needs both the first and last names of each runner for their running bibs. Combine both the first and last names and populate a new array called `fullNames`. This array will contain just strings.
-let fullNames = [];
-console.log(fullNames);
+// The event director needs both the first and last names of each runner for their running bibs.  Combine both the first and last names into a new array called fullName.
+let fullName = [];
+
+runners.forEach(runner => {
+    fullName.push(`${runner.first_name} ${runner.last_name}`);
+});
+console.log(fullName);
 
 // ==== Challenge 2: Use .map() ====
-// The event director needs to have all the runners' first names in uppercase because the director BECAME DRUNK WITH POWER. Populate an array called `firstNamesAllCaps`. This array will contain just strings.
-let firstNamesAllCaps = [];
-console.log(firstNamesAllCaps);
+// The event director needs to have all the runner's first names converted to uppercase because the director BECAME DRUNK WITH POWER. Convert each first name into all caps and log the result
+let allCaps = [];
+
+runners.map((runner, index) => {
+    allCaps[index] = runner.first_name.toUpperCase();
+})
+console.log(allCaps);
 
 // ==== Challenge 3: Use .filter() ====
-// The large shirts won't be available for the event due to an ordering issue. We need a filtered version of the runners array, containing only those runners with large sized shirts so they can choose a different size. This will be an array of objects.
-let runnersLargeSizeShirt = [];
-console.log(runnersLargeSizeShirt);
+// The large shirts won't be available for the event due to an ordering issue.  Get a list of runners with large sized shirts so they can choose a different size. Return an array named largeShirts that contains information about the runners that have a shirt size of L and log the result
+let largeShirts = [];
+
+largeShirts = runners.filter(runner => {
+    if (runner.shirt_size === 'L') {
+        return runner;
+    }
+});
+console.log(largeShirts);
 
 // ==== Challenge 4: Use .reduce() ====
-// The donations need to be tallied up and reported for tax purposes. Add up all the donations and save the total into a ticketPriceTotal variable.
-let ticketPriceTotal = 0;
+// The donations need to be tallied up and reported for tax purposes. Add up all the donations into a ticketPriceTotal array and log the result
+let ticketPriceTotal = [];
+
+ticketPriceTotal = runners.reduce((totalValue, runner) => {
+    return totalValue + runner.donation;
+}, 0);
 console.log(ticketPriceTotal);
 
+
+
+
 // ==== Challenge 5: Be Creative ====
 // Now that you have used .forEach(), .map(), .filter(), and .reduce().  I want you to think of potential problems you could solve given the data set and the 5k fun run theme.  Try to create and then solve 3 unique problems using one or many of the array methods listed above.
 
+const students = [
+    {
+        name: 'Estella Shanae',
+        age: 24,
+        phone: '(215)34-5676',
+        id: 1
+    },
+
+    {
+        name: 'Frankie Davina',
+        age: 28,
+        phone: '(215)17-5171',
+        id: 2
+    },
+    {
+        name: 'Cheri Sally',
+        age: 33,
+        phone: '(215)22-5676',
+        id: 3
+    }
+]
+
 // Problem 1
 
+const studentNamesPhones = [];
+
+students.forEach(student => {
+    return studentNamesPhones.push(`Name: "${student.name}" Phone number: ${student.phone}`);
+})
+
+console.log(studentNamesPhones);
+
 // Problem 2
 
-// Problem 3
+let averageStudentAge = [];
+
+averageStudentAge = students.reduce((averageAge, student) => {
+    return averageAge + student.age;
+}, 0);
+averageStudentAge = Math.floor(averageStudentAge/students.length);
+console.log(averageStudentAge);
+
+// Problem 3
+
+let studentsOver30 = students.filter(student => {
+    if (student.age > 30) {
+        return student;
+    }
+});
+
+console.log(studentsOver30);

assignments/callbacks.js

@@ -2,7 +2,7 @@
 
 const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
-/* 
+/*
 
   // GIVEN THIS PROBLEM:
 
@@ -41,29 +41,71 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
-}
+  return cb(arr.length);
+  }
+
+  getLength(items, function(arrLength) {
+    console.log(arrLength);
+  });
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
-}
+  return cb(arr[arr.length-1]);
+  }
+
+  last(items, function(lastItem) {
+    console.log(lastItem);
+  });
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
-}
+  return cb(x, y);
+  }
+
+  sumNums(2, 4, function(x, y) {
+    console.log(x + y);
+  });
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
-}
+  return cb(x, y);
+  }
+
+  multiplyNums(3, 7, function(x, y) {
+    console.log(x * y);
+  });
 
 function contains(item, list, cb) {
   // contains checks if an item is present inside of the given array/list.
   // Pass true to the callback if it is, otherwise pass false.
-}
+  if(list.includes(item)){
+      return cb(true);
+    } else {
+      return cb(false);
+    }
+  }
+
+  contains('Pencil', items, function(result){
+    console.log(result);
+  })
 
 /* STRETCH PROBLEM */
 
 function removeDuplicates(array, cb) {
   // removeDuplicates removes all duplicate values from the given array.
   // Pass the duplicate free array to the callback function.
   // Do not mutate the original array.
+  return cb(array);
 }
+
+console.log(removeDuplicates(arrayWithDuplicates, function(array){
+
+  let noDuplicatesArray = [];
+  array.forEach(item => {
+      if (!noDuplicatesArray.includes(item)) {
+          noDuplicatesArray.push(item);
+      }
+
+  });
+  return noDuplicatesArray;
+}));

assignments/closure.js

@@ -7,6 +7,21 @@
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
+function sayHi(greeting) {
+  const yourGreeting = greeting;
+  const name = 'Ana';
+  console.log(`${yourGreeting}. How are you?`);
+
+  function answer() {
+    const myAnswer = "I'm fine, thank you";
+    console.log(`${yourGreeting} ${name} ${myAnswer}`);
+  }
+
+  answer();
+}
+
+console.log(sayHi('Hi'));
+
 
 // ==== Challenge 2: Implement a "counter maker" function ====
 const counterMaker = () => {
@@ -16,7 +31,14 @@ const counterMaker = () => {
   //      NOTE: This `counter` function, being nested inside `counterMaker`,
   //      "closes over" the `count` variable. It can "see" it in the parent scope!
   // 3- Return the `counter` function.
+  let count = 0;
+  return () => ++count;
 };
+
+const newCounter = counterMaker();
+console.log(newCounter());
+console.log(newCounter());
+console.log(newCounter());
 // Example usage: const myCounter = counterMaker();
 // myCounter(); // 1
 // myCounter(); // 2