Javascript 如何使用搜索筛选器表单搜索JSON数组?
我有一个JSON数组和一个带有多个过滤器的搜索表单。在这个搜索表单中,我有4个用于筛选的选择下拉字段。如何根据用户选择的内容搜索JSON数组,然后在点击提交按钮后显示结果 例如,如果用户在“食品选择下拉列表”字段中选择“汉堡”,在“饮料选择下拉列表”字段中选择“可乐”。我希望能够展示所有提供这两种产品的餐厅。这可能吗Javascript 如何使用搜索筛选器表单搜索JSON数组?,javascript,jquery,arrays,json,Javascript,Jquery,Arrays,Json,我有一个JSON数组和一个带有多个过滤器的搜索表单。在这个搜索表单中,我有4个用于筛选的选择下拉字段。如何根据用户选择的内容搜索JSON数组,然后在点击提交按钮后显示结果 例如,如果用户在“食品选择下拉列表”字段中选择“汉堡”,在“饮料选择下拉列表”字段中选择“可乐”。我希望能够展示所有提供这两种产品的餐厅。这可能吗 var restaurants = [ {"restaurant" : { "name" : "McDonald's", "food" : "burger"
var restaurants = [
{"restaurant" : { "name" : "McDonald's", "food" : "burger", "drink" : "coke", "content" : "Lorem ipsum dolor sit amet" }},
{"restaurant" : { "name" : "KFC", "food" : "chicken", "drink" : "pepsi", "content" : "Lorem ipsum dolor sit amet" }},
{"restaurant" : { "name" : "Pizza Hut", "food" : "pizza", "drink" : "sprite", "content" : "Lorem ipsum dolor sit amet" }},
{"restaurant" : { "name" : "Dominos", "food" : "pizza", "drink" : "root beer", "content" : "Lorem ipsum dolor sit amet" }},
{"restaurant" : { "name" : "Popeyes", "food" : "chicken", "drink" : "mist", "content" : "Lorem ipsum dolor sit amet" }}
];
JavaScript有一个接受函数的本机。例如,您只需要在用户选择输入时生成此函数
function filter(a, food, drink) {
food = food ? food.toLowerCase() : 0;
drink = drink ? drink.toLowerCase() : 0;
return a.filter(function (e) {
if (food && e.restaurant.food.toLowerCase().indexOf(food) === -1)
return false;
if (drink && e.restaurant.drink.toLowerCase().indexOf(drink) === -1)
return false;
return true;
});
}
filter(restaurants, 'burger', 'coke');
// [{"restaurant":{"name":"McDonald's","food":"burger","drink":"coke","content":"Lorem ipsum dolor sit amet"}}]
过滤阵列的一种方法如下
复杂的通用过滤器
函数自定义过滤器(值){
返回函数(el){
var r=el.restaurant;
var keys=Object.keys(值);
var-answer=true;
for(变量i=0,len=keys.length;i
我对Igor的答案投了赞成票,但是,因为我想在JSFIDLE中给出一个完整的示例,下面是:
我添加了一个“Any”选项的可能性,因此在特定元素上没有过滤器
以下是总结:
HTML:
食物:
任何
汉堡
鸡
披萨
饮料:
任何
焦炭
百事可乐
(传说中的)精灵
根啤酒
薄雾
JavaScript:
var restaurants = [
{
"restaurant": {
"name": "McDonald's",
"food": "burger",
"drink": "coke",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "KFC",
"food": "chicken",
"drink": "pepsi",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "Pizza Hut",
"food": "pizza",
"drink": "sprite",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "Dominos",
"food": "pizza",
"drink": "root beer",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "Popeyes",
"food": "chicken",
"drink": "mist",
"content": "Lorem ipsum dolor sit amet"
}
}
];
var $food = $('#food'),
$drink = $('#drink'),
$result = $('#result');
$food.change(function () {
onChange();
});
$drink.change(function () {
onChange();
});
function onChange() {
var findedRestaurants = findRestaurants();
showRestaurants(findedRestaurants);
}
function findRestaurants() {
return filter($food.find('option:selected').val(), $drink.find('option:selected').val());
}
function filter(food, drink) {
var result = [];
for (var i = 0; i < restaurants.length; i++) {
var restaurant = restaurants[i].restaurant;
if ((!food || restaurant.food === food) && (!drink || restaurant.drink === drink)) {
result.push(restaurant);
}
}
return result;
}
function showRestaurants(restaurants) {
$result.empty();
for (var i = 0; i < restaurants.length; i++) {
$result.append($('<li>' + restaurants[i].name + '</li>'));
}
}
onChange();
var=[
{
“餐厅”:{
“名称”:“麦当劳”,
“食物”:“汉堡”,
“饮料”:“可乐”,
“内容”:“Lorem ipsum dolor sit amet”
}
},
{
“餐厅”:{
“名称”:“肯德基”,
“食物”:“鸡肉”,
“饮料”:“百事可乐”,
“内容”:“Lorem ipsum dolor sit amet”
}
},
{
“餐厅”:{
“名称”:“必胜客”,
“食物”:“比萨饼”,
“饮料”:“雪碧”,
“内容”:“Lorem ipsum dolor sit amet”
}
},
{
“餐厅”:{
“姓名”:“多米诺骨牌”,
“食物”:“比萨饼”,
“饮料”:“根啤酒”,
“内容”:“Lorem ipsum dolor sit amet”
}
},
{
“餐厅”:{
“姓名”:“大力水手”,
“食物”:“鸡肉”,
“饮料”:“薄雾”,
“内容”:“Lorem ipsum dolor sit amet”
}
}
];
变量$food=$(“#food”),
$饮料=$(“#饮料”),
$result=$(“#result”);
$food.change(功能(){
onChange();
});
$drink.change(函数(){
onChange();
});
函数onChange(){
var findedRestaurants=findRestaurants();
展示餐厅(findedRestaurants);
}
函数findRestaturants(){
返回过滤器($food.find('option:selected').val(),$drink.find('option:selected').val());
}
功能过滤器(食品、饮料){
var结果=[];
对于(变量i=0;i<0.length;i++){
var restaurant=餐厅[i]。餐厅;
如果((!food | | | restaurant.food==食品)和(!drink | | restaurant.drink==饮料)){
结果:推(餐厅);
}
}
返回结果;
}
功能展示餐厅(餐厅){
$result.empty();
对于(变量i=0;i<0.length;i++){
$result.append($(''+餐厅[i].name+' ');
}
}
onChange();
您可以迭代JSON数组,并在适当的地方进行条件筛选。你需要一个例子吗?如果是这样,请给我们一个JSON数组的例子。您可以直接在您的帖子中添加此内容。谢谢您的快速回复。我编辑了我的帖子,并添加了一个json数组的示例。因为您没有使用angular.js
,所以我不会将此作为答案,但我建议在这种特殊情况下使用它。这是一个实时演示:文档可以在这里找到:更接近您的问题,这将适合作为一个非常基本的开始:缺少每个对象的餐厅属性ooh:P,我将修复返回的对象是对原始数组对象的引用吗?我需要修改原始数组中的数组元素
function customFilter(food, drink) {
return function(el) {
var r = el.restaurant;
return r.food === food && r.drink === drink;
}
}
restaurants.filter( customFilter('Burger', 'Coke') );
function customFilter(values) {
return function(el) {
var r = el.restaurant;
var keys = Object.keys( values );
var answer = true;
for( var i = 0, len = keys.length; i < len; i++) {
if( r[keys[i]] !== values[keys[i]] ) {
answer = false;
break;
}
}
return answer;
}
}
restaurants.filter( customFilter({'food':'Burger', 'drink': 'Coke'}) );
<label for="food">Food:</label>
<select id="food">
<option value="">Any</option>
<option value="burger">Burger</option>
<option value="chicken">Chicken</option>
<option value="pizza">Pizza</option>
</select>
<label for="drink">Drink:</label>
<select id="drink">
<option value="">Any</option>
<option value="coke">Coke</option>
<option value="pepsi">Pepsi</option>
<option value="sprite">Sprite</option>
<option value="root beer">Root beer</option>
<option value="mist">Mist</option>
</select>
<ul id="result"></ul>
var restaurants = [
{
"restaurant": {
"name": "McDonald's",
"food": "burger",
"drink": "coke",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "KFC",
"food": "chicken",
"drink": "pepsi",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "Pizza Hut",
"food": "pizza",
"drink": "sprite",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "Dominos",
"food": "pizza",
"drink": "root beer",
"content": "Lorem ipsum dolor sit amet"
}
},
{
"restaurant": {
"name": "Popeyes",
"food": "chicken",
"drink": "mist",
"content": "Lorem ipsum dolor sit amet"
}
}
];
var $food = $('#food'),
$drink = $('#drink'),
$result = $('#result');
$food.change(function () {
onChange();
});
$drink.change(function () {
onChange();
});
function onChange() {
var findedRestaurants = findRestaurants();
showRestaurants(findedRestaurants);
}
function findRestaurants() {
return filter($food.find('option:selected').val(), $drink.find('option:selected').val());
}
function filter(food, drink) {
var result = [];
for (var i = 0; i < restaurants.length; i++) {
var restaurant = restaurants[i].restaurant;
if ((!food || restaurant.food === food) && (!drink || restaurant.drink === drink)) {
result.push(restaurant);
}
}
return result;
}
function showRestaurants(restaurants) {
$result.empty();
for (var i = 0; i < restaurants.length; i++) {
$result.append($('<li>' + restaurants[i].name + '</li>'));
}
}
onChange();