Dmwanik · Dmwanik · Apr 2, 2019
diff --git a/assignments/array-methods.js b/assignments/array-methods.js
@@ -55,23 +55,40 @@ 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 = [];
+let conferenceNames = runners.forEach(function(i){
+  fullName.push(i.first_name + " " + i.last_name);
+});
 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 = [];
-console.log(allCaps); 
+
+
+let allCaps = runners.map((person) => {
+    return person.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.  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 = [];
-console.log(largeShirts);
+
+
+let largeShirts = runners.filter((shirts) => {
+    return shirts.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 = [];
-console.log(ticketPriceTotal);
+
+
+let ticketPriceTotal = runners.reduce((donationTotal, donationAmount) => {
+    return donationTotal + donationAmount.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.

diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -1,6 +1,37 @@
 // 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', 'yo-yo'];
+
+function firstItem(arr, cb) {
+  // firstItem passes the first item of the given array to the callback function.
+  console.log(cb(arr))
+}
+
+let first = function(items) {
+  return items[0];
+}
+
+firstItem(items,first);
+
+// Anonymous Function Solution:
+// function firstItem(arr, cb) {
+//   cb(arr[0]);
+// }
+// firstItem(items, function(first) {
+//   console.log(first);
+// });
+
+function getLength(arr, cb) {
+  // getLength passes the length of the array into the callback.
+  console.log(cb(arr));
+}
+
+let arrayLength = function(items) {
+  return items.length;
+}
+
+getLength(items,arrayLength);
+
 
 /* 
 
@@ -27,18 +58,31 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+
+  cb(arr[arr.length - 1]);
+}
 }
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  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.
+
+
+  last( items, function(lastItem) {
+    console.log(lastItem);
+  });
 }
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  cb(x + y);
+}
 }
 
 function contains(item, list, cb) {

diff --git a/assignments/closure.js b/assignments/closure.js
@@ -1,6 +1,11 @@
 // ==== Challenge 1: Write your own closure ====
 // Write a simple closure of your own creation.  Keep it simple!
-
+function sayWsup() {
+  let name = "Dennis";
+  function slang() {
+    // accessing myName outside this function using a closure
+    console.log("sayWsup" + name)
+  }
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
@@ -18,4 +23,5 @@ 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.
+}
 };