final cmmit

index.js

@@ -11,9 +11,19 @@
 //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){
-
-}
+function map(array, fnc){
+  const myNewArray=[]; 
+    for (let i=0; i< array.length; i++){
+      const newNumber = fnc (array[i]);
+      myNewArray.push(newNumber)
+    } 
+    return(myNewArray)
+ }
+ const arr= [1,2,3,4];
+ const fnc=(x)=>{
+     if (x===1||3) return(x)
+    };
+map(arr,fnc)
 
 //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`
@@ -24,8 +34,17 @@ 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 filter(array, fnc){
+    myNewArray=[], 
+    for (i=0,i<array.length; i++){
+      const num = fnc(array[i]);
+      if (num===1||num===3){
+          myNewArray.push(num);
+       }
+    }
+    return (myNewArray)
+     }
+
 }
 
 //https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find
@@ -34,37 +53,55 @@ 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){
 
-}
+function find(theArray, fnc){ 
+    for (let i=0; i < theArray.length; i++){
+        if (fnc(theArray[i])){
+            return theArray[i];
+        }
+    }
+} 
+
 
 
 //return the last item in theArray
-function findLast(theArray){
 
+function findLast(theArray){
+    return theArray[theArray.length-1];
 }
 
 //return the first element of the array
 function head(theArray){
-
+return theArray[0];
 }
 
 //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){
 
+function reverse(theArray){
+const newArray = [];
+for (let i= theArray.length -1; i>= 0; i--){
+newArray.push(theArray [i]);
 }
+return newArray;
+} 
+
 
 //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){
-
+   const newArray=[];
+    for (let i=1; i < theArray.length; i++){
+            newArray.push(theArray[i]);
+    }
+    return newArray;
 }
 
+
 //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