Completed Object and Function exercises

2 years ago · 7eaf91323a
parent aaf7f36556
commit 7eaf91323a
3 changed files with 116 additions and 2 deletions
--- a/01_Day_JavaScript_Refresher/01_javascript_refresher/Function
+++ b/01_Day_JavaScript_Refresher/01_javascript_refresher/Function
@ -0,0 +1,8 @@
 <html>
    <head>
    </head>
    <body>
        <script src="./level3.js"></script> 
    </body>    
 </html>
--- a/01_Day_JavaScript_Refresher/01_javascript_refresher/Function
+++ b/01_Day_JavaScript_Refresher/01_javascript_refresher/Function
@ -0,0 +1,80 @@
 function userIdGeneratedByUser() {
    const charCount = prompt("Number of characters");
    const idCount = prompt("Number of ids");
    const allIDs = [];
    const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    for (let i = 0; i < idCount; i++) {
        allIDs.push(userIdGenerator(chars, charCount));
    }
 }
 // The program has been adapted from level2.js
 function userIdGenerator(availChars, charCount) {
    result = "";
    for (let i = 0; i < charCount; i++) {
        result += availChars[Math.floor(Math.random() * availChars.length)];
    }
    console.log(result);
    return result;
 }
 function generateColors(type, amount) {
    const toReturn = [];
    const chars = "0123456789abcdef";
    switch (type) {
        case "hexa":
            for (let i = 0; i < amount; i++) {
                toReturn.push(`#${userIdGenerator(chars, 6)}`);
            }
            break;
        case "rgb":
            for (let i = 0; i < amount; i++) {
                toReturn.push(`rgb(${Math.floor(Math.random()*256)}, ${Math.floor(Math.random()*256)}, ${Math.floor(Math.random()*256)})`);
            }
            break;
    }
    return toReturn.toString();
 }
 function shuffleArray(arr) {
    let newArr = [];
    let length = 0;
    arr.forEach(element => {
        newArr = newArr.insert(element, Math.floor(Math.random() * newArr.length));
    });
    return newArr;
 }
 Array.prototype.insert = function(value, index){
    console.log(value, index.toString());
    return [...this.slice(0,index), value, ...this.slice(index)];
 }
 function factorial(value) {
    if (value == 0) {
        return 1;
    }
    return value * factorial(value-1);
 }
 function isEmpty(param) {
    return value === undefined || value === null || value === '';
 }
 function average(array) {
    let sum = 0;
    array.forEach(elem => {
        if (elem == Number) {
            sum += elem;
        } else {
            console.log("Sorry the array is not fully numerical");
            return;
        }
    });
    return sum / array.length;
 }
 // userIdGeneratedByUser();
 // console.log(generateColors("hexa",20));
 // console.log(shuffleArray([1,2,3,4,5,6,7,8,9,10]))
 console.log(factorial(3));
--- a/01_Day_JavaScript_Refresher/01_javascript_refresher/Object
+++ b/01_Day_JavaScript_Refresher/01_javascript_refresher/Object
@ -155,6 +155,32 @@ function rateProduct(userID, productID, rating) {
    console.log("There is no such product");
 }
-function averageRating() {
+function averageRating(productID) {
-    
+    products.forEach(product => {
        if (product._id == productID) {
            return product.ratings.average();
        }
    })
 }
 product.ratings.average = function() {
    sum = 0;
    this.forEach(rating => {
        sum += rating;
    });
    sum = sum / this.length;
    return sum;
 }
 function likeProduct(userID, productID) {
    products.forEach(product => { // i realise this is not the most efficient way to find the product with the correect ID
        if (product._id == productID) {
            if (product.likes.find(userID) == -1) {
                product.likes.push(userID);    
            } else {
                product.likes.splice(product.likes.find(userID),1);
            }
        }
    })
 }