JS-II v1

assignments/array-methods.js

@@ -58,28 +58,82 @@ 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(function(element){
+
+        fullNames.push(`${element.first_name} ${element.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 = [];
+
+firstNamesAllCaps=runners.map(function(element){
+
+
+  return element.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( size => size.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(function( accumulator,item){
+return accumulator+item.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
+//sort first names 
+let sortNames = [];
+
+sortNames=runners.map(function(element){
+
+
+  return element.first_name ;
+
+});
+
+console.log(sortNames.sort());
+
 
 // Problem 2
+// how many peopler from skinix company 
+let skinixComp = [];
+
+skinixComp = runners.filter( element => element.company_name === 'Skinix');
+
+
+console.log(skinixComp.length);
+
+// Problem 3
+//create an array with emails
+let emails = [];
+
+runners.forEach(function(element){
+
+        emails.push(`${element.email} `);
+
+});
 
-// Problem 3
+console.log(emails);

assignments/callbacks.js

@@ -38,32 +38,85 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
   console.log(test2); // "this Pencil is worth a million dollars!"
 */
 
-
+//**********************************************************************************  1  */
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+
+  return cb(arr.length);
 }
 
+getLength(items, (nwArray) => { console.log(nwArray); });
+
+//**********************************************************************************  2  */
+
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+        return cb(arr[arr.length-1]);
+
 }
 
+last(items, (lastItem) => { console.log(lastItem); });
+
+//**********************************************************************************  3  */
+
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x+ y);
 }
+sumNums ( 12,34, (sumN) => {   console.log(sumN );  });
+
+//**********************************************************************************  4 */
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x*y);
 }
 
+multiplyNums (10,12, function(getMultply){
+  console.log(getMultply);
+}   );
+
+//**********************************************************************************  5  */
+
 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 ( "Notebook",items , function(checkIt){
+  console.log(checkIt);
+});
+
+
+//**********************************************************************************  stretch   */
+
 /* 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.
+
+  let fnlArry = [];
+
+  array.forEach(function(item){
+    if(fnlArry.includes(item) === false){
+      fnlArry.push(item); 
+  }
+  });
+
+
+return cb(fnlArry);
 }
+
+removeDuplicates(items, function(finalArry){
+
+console.log(finalArry);
+
+
+});

assignments/closure.js

@@ -3,8 +3,17 @@
 // 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.
+let firstName='Sam';
+let lastName='Smith';
 
 
+
+function getFullName(){
+  return  (`${firstName} ${lastName}`);
+}
+
+console.log(getFullName());
+
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
 
@@ -21,6 +30,22 @@ const counterMaker = () => {
 // myCounter(); // 1
 // myCounter(); // 2
 
+let count = 0 ;
+
+
+const myCounter = counterMaker(
+
+  function Counter (){
+
+  count++;
+  console.log(count);
+  return count;
+
+}
+);
+
+myCounter();
+
 // ==== Challenge 3: Make `counterMaker` more sophisticated ====
 // It should have a `limit` parameter. Any counters we make with `counterMaker`
 // will refuse to go over the limit, and start back at 1.