Callbacks and Closure done

julmo611 · julmo611 · commit c0d1bf4e744f · 2019-01-22T16:05:17.000-08:00
diff --git a/README.md b/README.md
@@ -25,11 +25,11 @@ This task focuses on getting practice with callback functions by giving you an a
 
 Use `.forEach()`, `.map()`, `.filter()`, and `.reduce()` to loop over an array with 50 objects in it. The [array-methods.js](assignments/array-methods.js) file contains several challenges built around a fundraising 5K fun run event.
 
-* [ ] Review the contents of the [array-methods.js](assignments/array-methods.js) file.  
+* [x] Review the contents of the [array-methods.js](assignments/array-methods.js) file.  
 
-* [ ] Complete the problems provided to you
+* [x] Complete the problems provided to you
 
-* [ ] Notice the last three problems are up to you to create and solve.  This is an awesome opportunity for you to push your critical thinking about array methods, have fun with it.
+* [x] Notice the last three problems are up to you to create and solve.  This is an awesome opportunity for you to push your critical thinking about array methods, have fun with it.
 
 ## Task 4: Closures
 
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
@@ -21,27 +21,72 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 */
 
+function firstItem(arr, cb) {
+  return cb(arr[0]);
+}
+
+firstItem(items, (item) => {
+console.log(item);
+});
+
+
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  cb(arr.length);
 }
 
+getLength(items, (lengthOfList) => {
+  console.log(lengthOfList);
+} )
+
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  return cb(arr.slice(-1)[0] );
 }
 
+last(items, (lastOfList) => {
+console.log(lastOfList);
+});
+
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+cb(x,y);  
+
 }
 
+function sum(a,b) {
+  console.log(a+b);
+} 
+
+sumNums(5,6,sum);
+
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  cb(x,y);
 }
 
+function multiply(a,b) {
+  console.log(a*b);
+} 
+
+multiplyNums(5,6,multiply);
+
+
 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('Gum', items, function(doYouHaveThis){
+  console.log(doYouHaveThis);
+});
 
 /* STRETCH PROBLEM */
 
diff --git a/assignments/closure.js b/assignments/closure.js
@@ -2,6 +2,19 @@
 // Write a simple closure of your own creation.  Keep it simple!
 
 
+function nameLastName (firstName, lastName) {
+  const startingName = "My name is";
+ 
+  function makeFullName () {
+    return (`${startingName} ${firstName} ${lastName}`);    
+}
+return makeFullName ();
+}
+
+console.log(nameLastName ("Julian", "Moreno"));
+
+
+
 // ==== Challenge 2: Create a counter function ====
 const counter = () => {
   // Return a function that when invoked increments and returns a counter variable.
@@ -10,6 +23,24 @@ const counter = () => {
 // newCounter(); // 1
 // newCounter(); // 2
 
+const todaysCoffees = () => {
+	let coffee = 0;
+	
+	return function() {
+		return ++coffee;
+	}
+};
+
+const newTodaysCofees = todaysCoffees();
+console.log(newTodaysCofees() + " ");
+console.log(newTodaysCofees() + " One more");
+console.log(newTodaysCofees() + " One more");
+console.log(newTodaysCofees() + " One more");
+console.log(newTodaysCofees() + " One more");
+console.log(newTodaysCofees() + " One more");
+
+
+
 /* STRETCH PROBLEM, Do not attempt until you have completed all previous tasks for today's project files */
 
 // ==== Challenge 3: Create a counter function with an object that can increment and decrement ====
