index.js

//https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
//create a function called `map`, it should take 2 parameters `array` and `iteratee`
//`array` must be an array
//`iteratee` must be a function that takes one parameter returns something
//The point of the javascript map function is to take an array and return different array with the exact same number of items in it
//The items will be whatever the function `iteratee` creates
//in the map function create a new empty array and store in a variable named whatever you want (myNewArray)
//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 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
//create a function called `filter`, it should take 2 parameters `array` and `iteratee`
//`array` must be an array
//`iteratee` must be a function that takes one parameter and returns a bool
//in the map function create a new empty array and store in a variable named whatever you want (myNewArray)
//loop `array` and call iteratee for each thing in the array, 
//     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
//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
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;
}


//return the last item in theArray
function findLast(theArray){

}

//return the first element of the array
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
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
//assume the array will always have numbers
//use a while loop to constantly loop theArray until it is sorted
//use a for loop to loop theArray
//look at the current item and the next item, compare them
//if the items are out of order, swap them
//initialize a variable that indicates if a swap had to be done, set it to false
//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){

}

exports.map = map;
exports.filter = filter;
exports.find = find;
exports.head = head;
exports.reverse = reverse;
exports.tail = tail;
exports.sort = sort;
exports.findLast = findLast;