Landon Taylor

index.js

@@ -11,10 +11,24 @@
 //iteratee is a function that must return something, capture whatever it returns in a variable
 //add the returned value from iteratee tp myNewArray
 //after looping, return  myNewArray
-function map(array, iteratee){
 
+let arr = [2,9,1,2,3,4,5,13];
+
+function addFive (i) {
+    return i+5
 }
 
+function map(array, iteratee){
+    let myNewArray = [];
+    for (let i=0; i<array.length; i++) {
+        let newVar = iteratee(array[i])
+        myNewArray.push(newVar);
+    }
+    return myNewArray;
+}
+
+console.log(map(arr, addFive))
+
 //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
 //create a function called `filter`, it should take 2 parameters `array` and `iteratee`
 //`array` must be an array
@@ -24,47 +38,100 @@ 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
-function filter(array, iteratee){
 
+function removeThree (i) {
+    if(i>=3) {
+        return true
+    }
+}
+
+function filter(array, iteratee) {
+    let myNewArray = [];
+    for (let i=0; i<array.length; i++) {
+        let j = array[i];
+        if (iteratee(array[i])) {
+            myNewArray.push(j);
+        }
+    }
+    return myNewArray;
 }
 
+console.log(filter(arr, removeThree))
+
 //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
 //create a function called `find`, it should take 2 parameters `theArray` and `fnc`
 //loop theArray and call the fnc for each thing in the array, 
 //     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){
 
+function thingy(x) {
+    if (x>4) {
+        return true;
+    }
 }
 
+function find(theArray, fnc){
+    for (let i=0; i<theArray.length; i++) {
+        if (fnc(theArray[i])) {
+            console.log(theArray[i]);
+            break;
+        }
+    }
+}
+
+find(arr, thingy);
 
 //return the last item in theArray
 function findLast(theArray){
-
+    let lastOne = theArray[theArray.length-1];
+    console.log(lastOne);
 }
 
+findLast(arr);
+
 //return the first element of the array
 function head(theArray){
-
+    let firstOne = theArray[0]
+    console.log(firstOne);
 }
 
+head(arr);
+
 //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){
 
+newArr = [10, 15, 20, 25, 30, 35];
+
+function reverse(theArray){
+    let reversedArr = [];
+    // while (theArray.length != 0) {
+    //     reversedArr.push(theArray.pop());
+    // }
+    for (let i=theArray.length-1; i>=0; i--) {
+        reversedArr.push(theArray[i])
+    }
+    console.log(reversedArr);
 }
 
+reverse(newArr);
+
 //create a new array
 //loop theArray
 //add the item from each loop to the new array except the first item
 //return the new array
 function tail(theArray){
-
+    let newArr = [];
+    for (let i=1; i<theArray.length; i++) {
+        newArr.push(theArray[i]);
+    }
+    console.log(newArr);
 }
 
+tail(newArr);
+
 //implement the most basic sorting algorithm there is
 //assume the array will always have numbers
 //use a while loop to constantly loop theArray until it is sorted
@@ -75,10 +142,26 @@ function tail(theArray){
 //if a swap is done set it to true
 //after each for loop check the variable, if true, continue the while loop
 //if false return theArray
-function sort(theArray){
 
+let yarra = [23,4,6,56,8,13,98,3,4,78]
+
+function sort(theArray){
+
+    for (let i=0; i<theArray.length-1; i++) {
+        while (theArray[i]>theArray[i+1]) {
+            theArray.splice([i],2,theArray[i+1],theArray[i]);
+            for (let j=1; j<theArray.length+1; j++) {
+                if (theArray[i]>theArray[j]) {
+                    i=0
+                }
+            }
+        }
+    }
+    console.log(theArray);
 }
 
+sort(yarra);
+
 exports.map = map;
 exports.filter = filter;
 exports.find = find;