你好,
我试图过滤名为 products 的数组,每个产品填充1个字符串。
var products = [
'canadian black angus beef fresh',
'canadian black angus beef frozen',
'american black angus beef frozen'
];
搜索首先将表单输入elemnt拆分为名为 keywords 的数组中的空格,其中包含可变长度的字符串。
var keywords = ['angus', 'fresh'];
实际上我正在循环使用product_array并为keyword_array创建第二个(内部)for循环。直到现在一切都很好。
这是我的缩短代码,显示了这个问题:
function test() {
var products = [
'canadian black angus beef fresh',
'canadian black angus beef frozen',
'american black angus beef frozen'
];
var keywords = ['angus', 'fresh'];
var hits = [];
for (var i = 0; i < products.length; i++) {
for (var j = 0; j < keywords.length; j++) {
if (products[i].indexOf(keywords[j]) != -1) {
/*
a if case for looped '&&' operator
would be great - or something like that
looped because of the variable length of keywords
*/
hits.push(products[i]);
}
}
}
console.log(hits);
/*
all products :/ - because all product matches with 'angus'
but im searching for an product that contains 'angus' && 'fresh'
*/
}
一些想法?!
答案 0 :(得分:1)
只需输入一个标记,检查是否包含所有关键字:
var containsAll;
for (var i = 0; i < products.length; i++) {
// Initialize flag -> guess that this product is correct
containsAll = true;
for (var j = 0; j < keywords.length; j++) {
if (products[i].indexOf(keywords[j]) === -1) {
// This keyword is not matched -> incorrect product
containsAll = false;
break;
}
}
// All products has been matched
if (containsAll) hits.push(products[i]);
}
看到这个小提琴:http://jsfiddle.net/eoz1y8n4/
答案 1 :(得分:1)
首先,您应该看一下.filter()
函数。它遍历一个数组,并根据您设置的条件的真/假返回值返回您想要的项目。
MDN's Docs on Array.prototype.filter()
现在,为了确保两个关键字都存在,您可以使用一些标志来指示它是否存在:
var hits = products.filter(function(item) {
var valid = true;
for (var i = 0; i < keywords.length; i++) {
if (item.indexOf(keywords[i]) === -1) {
valid = false;
}
}
return valid;
});
答案 2 :(得分:0)
您只需要确保您的产品中包含所有关键字:
function test() {
var products = [
'canadian black angus beef fresh',
'canadian black angus beef frozen',
'american black angus beef frozen'];
var keywords = ['angus', 'fresh'];
var hits = [];
for (var i = 0; i < products.length; i++) {
var allKeywordsMatch = true;
for (var j = 0; j < keywords.length; j++) {
if (products[i].indexOf(keywords[j]) === -1) {
allKeywordsMatch = false;
break;
}
}
if (allKeywordsMatch) hits.push(products[i]);
}
alert(hits);
}
test();
答案 3 :(得分:0)
该线程帮助我在搜索中获得了理想的结果,在此基础上,我扩展了上面给出的解决方案,可以在对象数组和多个字段(如标题,类别或标签)中进行搜索。
我将用代码发布答案,以在任何开发人员在这种情况下需要此帮助时提供帮助。仍有机会进一步改进,我希望这对某人有所帮助。
我的要求是:
我已经准备了一个实时演示。您可以运行并检查结果。
我有以下对象数组示例,其中包含文章列表。
let articles = [
{ "title": "ES6 — set, map, weak", "category": "ES6", "tags": ["ES6", "Set", "Map", "Weak"] },
{ "title": "JavaScript Modules: From IIFEs to CommonJS to ES6 Modules", "category": "JavaScript", "tags": ["JavaScript", "Modules", "IIFE", "ES6 Modules"] },
{ "title": "A guide to JavaScript Regular Expressions", "category": "JavaScript", "tags": ["JavaScript", "RegExp", "Regular Expressions"] },
];
如果有人在“搜索”框中键入“ es6 iife”,然后按一下按钮,则它将首先查看“标签”数组,如果找不到,则将查看“标题”和“类别”。
let output = document.querySelector('#output');
let articles = [
{ "title": "ES6 — set, map, weak", "category": "ES6", "tags": ["ES6", "Set", "Map", "Weak"] },
{ "title": "JavaScript Modules: From IIFEs to CommonJS to ES6 Modules", "category": "JavaScript", "tags": ["JavaScript", "Modules", "IIFE", "ES6 Modules"] },
{ "title": "A guide to JavaScript Regular Expressions", "category": "JavaScript", "tags": ["JavaScript", "RegExp", "Regular Expressions"] },
];
let initialContent = '';
articles.map(article => {
initialContent += `<li>
<p><b>Title : </b> ${article.title}</p>
<p><b>Category : </b> ${article.category}</p>
<p><b>Tags : </b> ${article.tags}</p>
</li>`;
});
output.innerHTML = initialContent;
function filter() {
let searchTerm = document.querySelector('#searchBox').value;
let keywords = searchTerm.split(' ');
let articleBySearch = [];
articles.map((article) => {
let allKeywordsMatch = true;
keywords.map((keyword) => {
if (article.tags.some((tag) => tag.toLowerCase().indexOf(keyword.toLowerCase()) !== -1)) {
allKeywordsMatch = true;
} else {
if (article.title.toLowerCase().indexOf(keyword.toLowerCase()) === -1 && article.category.toLowerCase().indexOf(keyword.toLowerCase()) === -1) {
allKeywordsMatch = false;
}
}
});
if (allKeywordsMatch) articleBySearch.push(article);
});
// Display Output in the browser
let htmlContent = '';
articleBySearch.map(article => {
htmlContent += `<li>
<p><b>Title : </b> ${article.title}</p>
<p><b>Category : </b> ${article.category}</p>
<p><b>Tags : </b> ${article.tags}</p>
</li>`;
});
output.innerHTML = htmlContent;
}
body {
font-family: Arial, Helvetica, sans-serif;
font-size: 16px;
}
.example {
border: 1px solid rgb(245, 28, 118);
width: 400px;
margin: 0 auto;
padding: 1em;
}
.example #searchBox {
padding: 10px;
border: 1px solid #cccccc;
}
.example #searchBox:focus {
padding: 10px;
border: 1px solid #0059ff;
}
.example button {
padding: 10px;
color: #FFF;
background-color: #0059ff;
border: 1px solid #0059ff;
}
.example ul {
margin: 0;
padding: 0;
list-style: none;
}
.example li {
border: 1px solid #cccccc;
padding: 1em;
margin: 1em 0;
}
<div class="example">
<input type="text" id="searchBox" placeholder="Type your words to search" />
<button onClick="filter()">Click to Filter</button>
<ul id="output"></ul>
</div>