Josh humphrey-JavaScript-II

assignments/array-methods.js

@@ -58,28 +58,66 @@ 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 = [];
+runners.forEach(runner => {
+  fullNames.push(`${runner.first_name} ${runner.last_name}`);
+})
 console.log(fullNames);
 
 // ==== 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 = [];
+runners.map(runner => {
+  firstNamesAllCaps.push(runner.first_name.toUpperCase());
+})
 console.log(firstNamesAllCaps);
 
 // ==== 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 = [];
+runnersLargeSizeShirt = runners.filter(runner => (runner.shirt_size ==='L'));
 console.log(runnersLargeSizeShirt);
 
 // ==== 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;
+ticketPriceTotal = runners.reduce((total, runner) => {
+  return total + 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.
 
 // Problem 1
+//Return companies alongside donations
+let company_donation = [];
+
+  runners.map(company => {
+    company_donation.push(`${company.company_name} donated $${company.donation}`);
+  })
+
+  console.log(company_donation);
+
+
+
 
 // Problem 2
+//Add all runners to email list without their knowledge
+
+let addToMailer = [];
+runners.forEach(runner => {
+  addToMailer.push(runner.email);
+})
+console.log(addToMailer);
+
+// Problem 3
+//Return an array of the companies with the highest donations
+
+let highRollers = [];
 
-// Problem 3
+runners.map(runner => {
+  if(runner.donation > 200) {
+    highRollers.push(runner.company_name);
+  }
+})
+console.log(highRollers);

assignments/callbacks.js

@@ -38,28 +38,52 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
   console.log(test2); // "this Pencil is worth a million dollars!"
 */
 
-
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  cb(arr.length);
 }
 
+getLength(items, (length) => {
+  console.log(length);
+})
+
+
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  cb(arr.pop())
 }
 
+last(items,(lastOne) => {
+  console.log(lastOne);
+})
+
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  cb(x + y);
 }
+sumNums(2, 4, (sum) => {
+  console.log(sum);
+})
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  cb( x * y);
 }
 
+multiplyNums(5,9,(product) => {
+  console.log(product)
+})
+
 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.
+  cb(list.indexOf(item) > -1 ? true : false);
 }
 
+contains('Pencil', items, (bool) =>{
+  console.log(bool);
+})
+
 /* STRETCH PROBLEM */
 
 function removeDuplicates(array, cb) {

assignments/closure.js

@@ -3,20 +3,52 @@
 // Keep it simple! Remember a closure is just a function
 // that manipulates variables defined in the outer scope.
 // The outer scope can be a parent function, or the top level of the script.
+function planet() {
+  let citizens = 0;
+  console.log(`I have ${citizens} inhabitants`);
 
+  function continent() {
+    citizens = 1000;
+    console.log(`Not true, all ${citizens} of us live here!`)
+
+    function country() {
+      citizens = 1500;
+      console.log(`With us it makes ${citizens}!`);
+    }
+    country();
+  }
+  continent();
+}
+
+planet();
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
 
 // ==== Challenge 2: Implement a "counter maker" function ====
-const counterMaker = () => {
+
   // IMPLEMENTATION OF counterMaker:
   // 1- Declare a `count` variable with a value of 0. We will be mutating it, so declare it using `let`!
   // 2- Declare a function `counter`. It should increment and return `count`.
   //      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.
-};
+  // const counterMaker = () => {
+  // let count = 0;
+
+
+  //     return function counter() {
+  //       count++;
+  //       return count;
+  //     }
+
+  //   //counter
+  // }
+  // const newCounter = counterMaker();
+  // console.log(newCounter());
+  // console.log(newCounter());
+  // console.log(newCounter());
+
 // Example usage: const myCounter = counterMaker();
 // myCounter(); // 1
 // myCounter(); // 2
@@ -25,9 +57,53 @@ const counterMaker = () => {
 // It should have a `limit` parameter. Any counters we make with `counterMaker`
 // will refuse to go over the limit, and start back at 1.
 
+const counterMaker = () => {
+  let count = 0;
+  const limit = 5;
+
+
+      return function counter() {
+
+        count == limit ? count = 1 : count++;
+        return count;
+      }
+
+    //counter
+  }
+  const newCounter = counterMaker();
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+  console.log(newCounter());
+
 // ==== Challenge 4: Create a counter function with an object that can increment and decrement ====
 const counterFactory = () => {
   // Return an object that has two methods called `increment` and `decrement`.
   // `increment` should increment a counter variable in closure scope and return it.
   // `decrement` should decrement the counter variable and return it.
+  let count = 0;
+    return {
+      increment: function() {
+        count++;
+        return count;
+      },
+      decrement: function() {
+        count--;
+        return count;
+      }
+    }
 };
+
+const newFactory = counterFactory();
+
+console.log(newFactory.increment());
+console.log(newFactory.decrement());
+