FINISHED!

.vscode/settings.json

@@ -1,3 +1,4 @@
 {
-  "standard.enable": false
+  "standard.enable": false,
+  "liveServer.settings.port": 5501
 }

index.js

@@ -48,8 +48,9 @@ function processFirstItem(stringList, callback) {
  * [2] Invoking `processLength` passing `[]` and `(num) => "There are " + num`,
  * should return "There are 0".
 */
-function processLength(/* CODE HERE */) {
+function processLength(list, callback) {
   /* CODE HERE */
+  return callback(list.length)
 }
 
 /**
@@ -66,8 +67,9 @@ function processLength(/* CODE HERE */) {
  * Invoking `processLastItem` passing `['foo', 'bar']` and `(str) => str + str`,
  * should return 'barbar'.
 */
-function processLastItem(/* CODE HERE */) {
+function processLastItem(stringList, callback) {
   /* CODE HERE */
+  return callback(stringList[stringList.length - 1])
 }
 
 /**
@@ -88,10 +90,12 @@ function processLastItem(/* CODE HERE */) {
  * [2] Invoking `processSum` passing `-5`, '-1', and `(num) => num + 1000`,
  * should return 994.
 */
-function processSum(/* CODE HERE */) {
+function processSum(num1, num2, callback) {
   /* CODE HERE */
+  return callback(num1 + num2)
 }
 
+
 /**
  * ### Challenge `processProduct`
  * 
@@ -110,10 +114,10 @@ function processSum(/* CODE HERE */) {
  * [2] Invoking `processProduct` passing 25 and 0 and `(num) => num + 1000`,
  * should return 1000.
 */
-function processProduct(/* CODE HERE */) {
+function processProduct(num1, num2, callback) {
   /* CODE HERE */
+  return callback(num1 * num2)
 }
-
 /**
  * ### Challenge `processDuplicateFree`
  * THIS IS A STRETCH PROBLEM! ATTEMPT ONLY AFTER COMPLETING ALL NON-STRETCH CHALLENGES!
@@ -155,10 +159,16 @@ function processDuplicateFree(/* CODE HERE ONLY AFTER COMPLETING ALL OTHER TASKS
  * 
  * [2] Invoking `lowerCaseStrings` with `['a', 'b', 'c' ]` will return `[ 'a', 'b', 'c' ]`.
 */
-function lowerCaseStrings(/* code here */) {
-  /* code here */
+function lowerCaseStrings(strings) {
+  const stringArray = [];
+  const lowerCaseArray = strings.forEach(function(string){
+    stringArray.push(string.toLowerCase())
+
+  })
+  return stringArray;
 }
 
+
 /**
  * ### Challenge `isItAnApple`
  * 
@@ -174,8 +184,17 @@ function lowerCaseStrings(/* code here */) {
  * 
  * [2] Invoking `isItAnApple` with `['a', 'b', 'c' ]` will return `[ false, false, false ]`.
 */
-function isItAnApple(/* code here */) {
+function isItAnApple(strings) {
   /* code here */
+  const newArray = [];
+  strings.map(function(string) {
+    if (string === "apple"){
+      newArray.push(true);
+    } else {
+      newArray.push(false);
+    }
+  })
+ return newArray
 }
 
 /**
@@ -194,8 +213,12 @@ function isItAnApple(/* code here */) {
  * 
  * [2] Invoking `removeApple` with `['a', 'b', 'c' ]` will return `[ 'a', 'b', 'c' ]`.
 */
-function removeApple(/* code here */) {
+function removeApple(strings) {
   /* code here */
+  const rmvApple = strings.filter(function(fruit){
+    return fruit !== "apple"
+  })
+  return rmvApple
 }
 
 /**
@@ -213,8 +236,12 @@ function removeApple(/* code here */) {
  * 
  * [2] Invoking `stringSmash` with `['a', 'b', 'c' ]` will return `abc`.
 */
-function stringSmash(/* code here */) {
+function stringSmash(strings) {
   /* code here */
+  const newString = strings.reduce(function(accumulator, string){
+    return accumulator + string;
+  }, "");
+  return newString
 }
 
 // A local community center is holding a fund raising 5k fun run and has invited
@@ -232,8 +259,13 @@ function stringSmash(/* code here */) {
  * @returns an array with all the runners' full names in the following format: "Smith, John".
  * The full names appear in the array in the same order the runners appear in the `runners` array.
 */
-function getFullNames(/* CODE HERE */) {
+function getFullNames(runners) {
   /* CODE HERE */
+  const runnerNames = [];
+  runners.forEach(function(runners){
+    return runnerNames.push(`${runners.last_name}, ${runners.first_name}`)
+  })
+  return runnerNames
 }
 
 /**
@@ -248,8 +280,12 @@ function getFullNames(/* CODE HERE */) {
  * @returns an array with all the runners' first names in ALL CAPS.
  * The first names appear in the array in the same order the runners appear in the `runners` array.
 */
-function firstNamesAllCaps(/* CODE HERE */) {
+function firstNamesAllCaps(runners) {
   /* CODE HERE */
+  const drunkWithPower = runners.map(function(runners){
+    return runners.first_name.toUpperCase();
+  })
+  return drunkWithPower
 }
 
 /**
@@ -266,8 +302,12 @@ function firstNamesAllCaps(/* CODE HERE */) {
  * @returns an array containing only the runners that use the given `tShirtSize`.
  * The runners in the array appear in the same order they appear in the `runners` array.
 */
-function getRunnersByTShirtSize(/* CODE HERE */) {
+function getRunnersByTShirtSize(runners, tShirtSize) {
   /* CODE HERE */
+  const crazyEventDirector = runners.filter(function(runner){
+   return runner.shirt_size === tShirtSize   
+  })
+  return crazyEventDirector  
 }
 
 /**