dangnlu18 · dangnlu18 · Jun 28, 2019 · Jun 29, 2019 · Jun 29, 2019
diff --git a/assignments/array-methods.js b/assignments/array-methods.js
@@ -56,28 +56,60 @@ const runners = [{"id":1,"first_name":"Charmain","last_name":"Seiler","email":"c
 // ==== 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 into a new array called fullName. 
 let fullName = [];
+function full(val){
+	let first = val.first_name;
+	let last = val.last_name;
+	fullName.push(`${first} ${last}`);
+};
+
+runners.forEach(full);
 console.log(fullName);
 
 // ==== Challenge 2: Use .map() ====
 // 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 = [];
+let allCaps = runners.map(entry => entry.first_name.toUpperCase())
+// function caps(entry){
+// 	fName = entry.first_name.toUpperCase();
+// 	allCaps.push(fName);
+// };
+
+runners.map(caps)
 console.log(allCaps); 
 
+
 // ==== Challenge 3: Use .filter() ====
 // 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 = [];
+let largeShirts = runners.filter(entry => runners.shirt_size === 'L');
 console.log(largeShirts);
 
 // ==== Challenge 4: Use .reduce() ====
 // 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 = [];
+let ticketPriceTotal = runners.reduce((acc, curr)=>{
+	acc += curr.donation;
+});
 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
+// Problem 1: parse all emails to send a thank you message
+let emails = [];
+function email(val){
+	let emailAdd = val.email;
+	emails.push(emailAdd);
+}
+runners.forEach(email);
+console.log(emails);
+
+// Problem 2: find out how much Skinix donated
+let onlySkinix = runners.filter(entry => entry.company_name === 'Skinix');
+let totalSkinix = onlySkinix.reduce((acc,curr)=> {return acc += curr.donation;},0);
+console.log(totalSkinix);
+
+// Problem 3: find how many medium shirts were given away
+
+let onlyMedium = runners.filter(entry => entry.shirt_size === 'M');
+console.log(onlyMedium.length);
+
 
-// Problem 2
 
-// Problem 3
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -1,8 +1,8 @@
 // Create a higher order function and invoke the callback function to test your work. You have been provided an example of a problem and a solution to see how this works with our items array.  Study both the problem and the solution to figure out the rest of the problems.
 
-const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
+const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum', "Gum"];
 
-/* 
+
 
   //Given this problem: 
 
@@ -22,34 +22,63 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
     console.log(first)
   });
 
-*/
 
+// getLength passes the length of the array into the callback.
+// higher order function
 
 function getLength(arr, cb) {
-  // getLength passes the length of the array into the callback.
+  return cb(arr.length);
 }
 
+function logger(val){
+  console.log(`The value you returned is ${val}`);
+}
+
+// function invocation
+getLength(arr, logger);
+
+
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  const lastItem = arr.pop();
+  return cb(lastItem);
 }
 
-function sumNums(x, y, cb) {
+last(arr, logger);
+
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+function sumNums(x, y, cb) {
+  return cb(x+y);
 }
 
-function multiplyNums(x, y, cb) {
+sumNums(9, 3, logger);
+
+
   // multiplyNums multiplies two numbers and passes the result to the callback.
+function multiplyNums(x, y, cb) {
+  return cb(x*y);
 }
 
-function contains(item, list, cb) {
+multiplyNums(3, 5, logger);
+
   // contains checks if an item is present inside of the given array/list.
   // Pass true to the callback if it is, otherwise pass false.
+function contains(item, list, cb) {
+  return cb(list.includes(item));
 }
 
+contains("Gum", items, logger);
+
 /* 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.
+
+function removeDuplicates(array, cb) {
+  let noDupes = [];
+  array.map((e,i) => !noDupes.includes(e) && noDupes.push(e));
+  return cb(noDupes)
 }
+
+removeDuplicates(items, logger);
diff --git a/assignments/closure.js b/assignments/closure.js
@@ -1,14 +1,24 @@
 // ==== Challenge 1: Write your own closure ====
 // Write a simple closure of your own creation.  Keep it simple!
+const name = "Dang"
 
+function hungry(food){
+	return `${name} is hungry for ${food}`
+}
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
 
 // ==== Challenge 2: Create a counter function ====
 const counter = () => {
-  // Return a function that when invoked increments and returns a counter variable.
+
+	let count = 0;
+	return function(){
+		count = count + 1;
+		return count;
+	} 
 };
+  // Return a function that when invoked increments and returns a counter variable.
 // Example usage: const newCounter = counter();
 // newCounter(); // 1
 // newCounter(); // 2
@@ -18,4 +28,15 @@ 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.
+  "increment": function(){
+  	count = count +1;
+  	return count;
+  },
+  "decrement": function(){
+  	count = count -1;
+  	return count;
+  }
+
+
+
 };