submission

practice.js

@@ -27,7 +27,9 @@
   Then invoke the callback function, passing in the first element in the array as it's argument.
 */
 
-// Code Here
+function first(arr, cb) {
+  cb(arr[0])
+}
 
 // Do not edit the code below.
 var names = ['Aodhan', 'Greg', 'Jake', 'Oscar', 'Aodhan', 'Tanner', 'Greg'];
@@ -47,7 +49,9 @@ first(names, function(firstName){
   Then invoke the callback, passing in the last element in the array as the argument.
 */
 
-//Code Here
+function last(arr, cb) {
+  cb(arr[arr.length-1])
+}
 
 // Do not edit the code below.
 last(names, function(lastName){
@@ -65,7 +69,9 @@ last(names, function(lastName){
   Invoke the callback, passing in the product of the two numbers multiplied as the argument.
 */
 
-//Code Here
+function multiply(num1, num2, cb) {
+  cb(num1 * num2)
+}
 
 // Do not edit the code below.
 multiply(4, 3, function(answer){
@@ -84,7 +90,13 @@ multiply(4, 3, function(answer){
   If the name does not exist, invoke the callback with false as the argument.
 */
 
-//Code Here
+function contains(arr, name, cb){
+  for (i in arr){
+    if (arr[i] === name)
+      cb(true)
+  }
+  cb(false)
+}
 
 // Do not edit the code below.
 contains(names, 'Oscar', function(result){
@@ -105,7 +117,16 @@ contains(names, 'Oscar', function(result){
   Remove any duplicate values from the array, and invoke the callback with the modified array as an argument.
 */
 
-//Code Here
+function uniq(arr, cb) {
+  let unique_array = []
+    for(let i = 0;i < arr.length; i++){
+        if(unique_array.indexOf(arr[i]) == -1){
+            unique_array.push(arr[i])
+        }
+    }
+    cb(unique_array)
+}
+
 
 // Do not edit the code below.
 uniq(names, function(uniqArr){
@@ -122,7 +143,11 @@ uniq(names, function(uniqArr){
   For each name in the array, invoke the callback and pass in the name and the name's index as arguments.
 */
 
-//Code Here
+function each(arr, cb){
+  arr.forEach(function(element) {
+    cb(element, arr.indexOf(element))
+  });
+}
 
 // Do not edit the code below.
 each(names, function(item, indice){
@@ -131,15 +156,19 @@ each(names, function(item, indice){
 // Do not edit the code above.
 
 
-
 ////////// PROBLEM 7 //////////
 
 /*
   Write a function called getUserById that takes in three parameters: an array of objects (users), an id and a callback, and searches for the user with a matching id.
   When the correct user object is found, invoke the callback with the user object as an argument.
 */
 
-// Code here
+function getUserById(arr, id, cb){
+  arr.forEach(function (element) {
+    if (element.id === id)
+      cb(element)
+  });
+}
 
 // Do not edit the code below.
 var users = [

user.json

@@ -1,4 +1,4 @@
 {
-  "name": "",
-  "email": ""
+  "name": "Jericho Aldemo",
+  "email": "jericho.aldemo@boom.camp"
 }