我正在使用javascript在一家小型杂货店网站上工作，我在从最便宜到最昂贵的产品类别中对项目进行排序时遇到了麻烦。
客户选择"客户"类别并选择他们的过敏原规格，选择规格后，他们必须选择产品选项卡，他们将在其中看到产品列表，如屏幕截图所示。
如您所见，产品定价都混杂在一起，我怎样才能使产品从最便宜的产品到底部最昂贵的产品。
代码如下：
//groceries.js
// Array of products, each product is an object with different fieldset
// A set of ingredients should be added to products
var products = [
{
name: "brocoli $1.99",
vegetarian: true,
glutenFree: true,
price: 1.99,
organic:true
},
{
name: "bread $2.35",
vegetarian: true,
glutenFree: false,
price: 2.35,
organic:false
},
{
name: "salmon $10.00",
vegetarian: false,
glutenFree: true,
price: 10.00,
organic:true
},
{
name: "chicken $8.99",
vegetarian: false,
glutenFree: true,
price: 8.99,
organic:true
},
{
name: "macaroni $2.99",
vegetarian: false,
glutenFree: false,
price: 2.99,
organic:true
},
{
name: "cake mix $3.99",
vegetarian: false,
glutenFree: false,
price: 3.99,
organic:true
},
{
name: "Jam $4.99",
vegetarian: true,
glutenFree: true,
price: 4.99,
organic:true
},
{
name: "banana $1.99",
vegetarian: true,
glutenFree: true,
price: 1.99,
organic:true
},
{
name: "eggs $1.50",
vegetarian: true,
glutenFree: true,
price: 1.50,
organic:true
},
{
name: "apples $2.49",
vegetarian: true,
glutenFree: true,
price: 2.49,
organic:true
}
];
// given restrictions provided, make a reduced list of products
// prices should be included in this list, as well as a sort based on price
function restrictListProducts(prods, restriction) {
let product_names = [];
for (let i=0; i<prods.length; i+=1) {
if ((restriction == "Vegetarian") && (prods[i].vegetarian == true)){
product_names.push(prods[i].name);
}
else if ((restriction == "Gluten Free") && (prods[i].glutenFree == true)){
product_names.push(prods[i].name);
}
else if((restriction == "GlutenFreeandVegetarian") && (prods[i].glutenFree == true) && (prods[i].vegetarian == true) ){
product_names.push(prods[i].name);
}
else if((restriction == "Organic") && (prods[i].organic == true) ){
product_names.push(prods[i].name);
}
else if((restriction == "GlutenFreeandOrganic") && (prods[i].organic == true) && (prods[i].glutenFree == true) ){
product_names.push(prods[i].name);
}
else if((restriction == "GlutenFreeandVegetarian") && (prods[i].vegetarian == true) && (prods[i].glutenFree == true) ){
product_names.push(prods[i].name);
}
else if((restriction == "GlutenFreeandVegetarianandOrganic") && (prods[i].organic == true) && (prods[i].vegetarian == true) && (prods[i].glutenFree == true) ){
product_names.push(prods[i].name);
}
else if (restriction == "None"){
product_names.push(prods[i].name);
}
}
return product_names;
}
// Calculate the total price of items, with received parameter being a list of products
function getTotalPrice(chosenProducts) {
totalPrice = 0;
for (let i=0; i<products.length; i+=1) {
if (chosenProducts.indexOf(products[i].name) > -1){
totalPrice += products[i].price;
}
}
return totalPrice;
}
// main.js
function openInfo(evt, tabName) {
// Get all elements with class="tabcontent" and hide them
tabcontent = document.getElementsByClassName("tabcontent");
for (i = 0; i < tabcontent.length; i++) {
tabcontent[i].style.display = "none";
}
// Get all elements with class="tablinks" and remove the class "active"
tablinks = document.getElementsByClassName("tablinks");
for (i = 0; i < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
// Show the current tab, and add an "active" class to the button that opened the tab
document.getElementById(tabName).style.display = "block";
evt.currentTarget.className += " active";
}
// generate a checkbox list from a list of products
// it makes each product name as the label for the checkbos
function populateListProductChoices(slct1, slct2) {
var s1 = document.getElementById(slct1);
var s2 = document.getElementById(slct2);
// s2 represents the <div> in the Products tab, which shows the product list, so we first set it empty
s2.innerHTML = "";
// obtain a reduced list of products based on restrictions
var optionArray = restrictListProducts(products, s1.value);
// for each item in the array, create a checkbox element, each containing information such as:
// <input type="checkbox" name="product" value="Bread">
// <label for="Bread">Bread/label><br>
for (i = 0; i < optionArray.length; i++) {
var productName = optionArray[i];
// create the checkbox and add in HTML DOM
var checkbox = document.createElement("input");
checkbox.type = "checkbox";
checkbox.name = "product";
checkbox.value = productName;
s2.appendChild(checkbox);
// create a label for the checkbox, and also add in HTML DOM
var label = document.createElement('label')
label.htmlFor = productName;
label.appendChild(document.createTextNode(productName));
s2.appendChild(label);
// create a breakline node and add in HTML DOM
s2.appendChild(document.createElement("br"));
}
}
// This function is called when the "Add selected items to cart" button in clicked
// The purpose is to build the HTML to be displayed (a Paragraph)
// We build a paragraph to contain the list of selected items, and the total price
function selectedItems(){
var ele = document.getElementsByName("product");
var chosenProducts = [];
var c = document.getElementById('displayCart');
c.innerHTML = "";
// build list of selected item
var para = document.createElement("P");
para.innerHTML = "You selected : ";
para.appendChild(document.createElement("br"));
for (i = 0; i < ele.length; i++) {
if (ele[i].checked) {
para.appendChild(document.createTextNode(ele[i].value));
para.appendChild(document.createElement("br"));
chosenProducts.push(ele[i].value);
}
}
// add paragraph and total price
c.appendChild(para);
c.appendChild(document.createTextNode("Total Price is " + getTotalPrice(chosenProducts)));
}/* This style sheet is taken from https://www.w3schools.com/howto/howto_js_tabs.asp> */
/* Style the tab */
.tab {
overflow: hidden;
border: 1px solid #ccc;
background-color: #f1f1f1;
}
/* Style the buttons that are used to open the tab content */
.tab button {
background-color: inherit;
float: left;
border: none;
outline: none;
cursor: pointer;
padding: 14px 16px;
transition: 0.3s;
}
/* Change background color of buttons on hover */
.tab button:hover {
background-color: #ddd;
}
/* Create an active/current tablink class */
.tab button.active {
background-color: #ccc;
}
/* Style the tab content */
.tabcontent {
display: none;
padding: 6px 12px;
border: 1px solid #ccc;
border-top: none;
}<!DOCTYPE html>
<html>
<head>
<! This style sheet is taken from https://www.w3schools.com/howto/howto_js_tabs.asp>
<link href="styles/style.css" rel="stylesheet" type="text/css">
</head>
<h1>Super Groceries</h1>
<body>
<!-- Tab links, each one with an onclick event associated with it -->
<div class="tab">
<button class="tablinks" onclick="openInfo(event, 'Client')">Client</button>
<button class="tablinks" onclick="openInfo(event, 'Products')">Products</button>
<button class="tablinks" onclick="openInfo(event, 'Cart')">Cart</button>
</div>
<!-- Tab content -->
<div id="Client" class="tabcontent">
<h3>Client Information</h3>
<p>Tell us a bit about you.</p>
Choose a Category:
<select id="dietSelect" name="dietSelect" onchange="populateListProductChoices(this.id, 'displayProduct')">
<option value=""></option>
<option value="Vegetarian">Vegetarian</option>
<option value="Gluten Free">GlutenFree</option>
<option value="Organic"> Organic</option>
<option value="GlutenFreeandVegetarian"> GlutenFreeandVegetarian</option>
<option value="GlutenFreeandOrganic"> GlutenFreeandOrganic</option>
<option value="VegetarianandOrganic"> VegetarianandOrganic</option>
<option value="GlutenFreeandVegetarianandOrganic"> GlutenFreeandVegetarianandOrganic</option>
<option value="None">None</option>
</select>
</div>
<div id="Products" class="tabcontent">
<h3>Your targeted products</h3>
<p>We preselected products based on your restrictions.</p>
Choose items to buy:
<div id="displayProduct"></div>
<button id="addCart" type="button" class="block" onclick="selectedItems()">
Add selected items to cart.
</button>
</div>
<div id="Cart" class="tabcontent">
<h3>Cart</h3>
<p>Here is your cart.</p>
<div id="displayCart"></div>
</div>
<script src="scripts/groceries.js"></script>
<script src="scripts/main.js"></script>
</body>
</html>谢谢
我制作了一个新的产品价格数组(您也可以在不创建新数组的情况下解决，但我解决了它，以便解决方案更容易理解(并将其从低价到高价排序：
var priceProducts = new Array(products.length);
for (let i = 0; i < priceProducts.length; i++) {
priceProducts[i] = products[i].price;
}
priceProducts.sort(((x, y) => x - y));
for (let i = 0; i < priceProducts.length; i++) {
console.log(priceProducts[i]);
}
输出：
1.5
1.99
2.35
2.49
2.99
3.99
4.99
8.99
10