acadash

index.js

@@ -9,10 +9,21 @@
 //loop array and extract the single item from the array per loop and store it in a variable
 //on each loop call iteratee() passing in the item from the current loop into the call to iteratee()
 //iteratee is a function that must return something, capture whatever it returns in a variable
-//add the returned value from iteratee tp myNewArray
+//add the returned value from iteratee to myNewArray
 //after looping, return  myNewArray
+const arr = [1, 2, 3, 4, 5];
+
+
 function map(array, iteratee){
 
+    const myNewArray = [];
+
+    for(i=0; i < array.length; i++){
+        let myVar = iteratee(arr[i]);
+        myNewArray.push(myVar);
+    }
+
+    return myNewArray;
 }
 
 //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
@@ -24,8 +35,21 @@ function map(array, iteratee){
 //     passing in the item from the current loop
 //iteratee will return true or false, if true add the item to myNewArray else do not
 //after looping, return myNewArray
+const arr = [1, 2, 3, 4, 5];
+
 function filter(array, iteratee){
 
+    const myNewArray = [];
+
+    for (let i = 0; i < array.length; i++) {
+        let index = array[i];
+        if(iteratee(index)) {
+            myNewArray.push(index);
+        }
+    }
+
+    return newArray;
+
 }
 
 //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
@@ -34,8 +58,19 @@ function filter(array, iteratee){
 //     passing in the item from the current loop
 //fnc will return true or false, if true return the item 
 //after looping, return null
-function find(theArray, fnc){
+const arr = [1, 2, 3, 4, 5];
 
+function find(theArray, fnc){
+    for(let i=0; i < array.length; i++){
+        let index = array[i];
+        if(fnc(index)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    return null;
 }
 
 
@@ -45,24 +80,43 @@ function findLast(theArray){
 }
 
 //return the first element of the array
-function head(theArray){
+const arr = [1, 2, 3, 4, 5];
 
+function head(theArray){
+    let index = arr[i];
+    if(index === 0) {
+        return index;
+    }
 }
 
 //create a new array
 //loop theArray in reverse order
 //add the item from each loop to the new array
 //return the new array
-function reverse(theArray){
+const arr = [1, 2, 3, 4, 5];
 
+function reverse(theArray){
+    let myNewArray = [];
+    for (var i = arr.length - 1; i >= 0; i--) {
+      myNewArray.push(arr[i]);
+    }
+    return myNewArray;
 }
 
 //create a new array
 //loop theArray
 //add the item from each loop to the new array except the first item
 //return the new array
+const arr = [1, 2, 3, 4, 5];
+
 function tail(theArray){
+    myNewArray = [];
+
+    for(i=1; i < arr.length; i++){
+        myNewArray.push(arr);
+    }
 
+    return myNewArray;
 }
 
 //implement the most basic sorting algorithm there is
@@ -86,4 +140,4 @@ exports.head = head;
 exports.reverse = reverse;
 exports.tail = tail;
 exports.sort = sort;
-exports.findLast = findLast;
+exports.findLast = findLast;