Question

尝试从一组对象中获取特定数据，这些数据由于多种原因而无法在服务器上托管。数据作为变量存储在文档中。这是我迄今为止一直在努力取得的成就：

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>

<script type="text/javascript">     
        var users = [{"username":"nphillips7m","first_name":"Nicole","last_name":"Phillips","email":"nphillips7m@ebay.co.uk","gender":"Female","sexuality":"Networked static concept","language":"Gagauz"},
{"username":"esimpson7n","first_name":"Elizabeth","last_name":"Simpson","gender":"Female","sexuality":"Future-proofed solution-oriented definition","language":"Malay"},
{"username":"llawrence7o","first_name":"Lillian","last_name":"Lawrence","email":"llawrence7o@technorati.com","gender":"Female","sexuality":"Re-contextualized demand-driven middleware","language":"Tetum"}]

        var simpson = users.find("last_name" + "Simpson")

        document.getElementById("return").innerHTML = function myfunction() {
            simpson;
        }
</script>

</head>

<body>
<div id="return"></div>
</body>

目前，我一直试图从用户中提取一些/任何数据＆＃39;数组，但是我希望用户能够搜索一个单词以及整个行＆＃39; /＆＃39;行＆＃39;与用户＆＃39;中的单词/单词相关的数据显示为结果。我应该用什么方法来实现这个目标？

Answer 1

1。您需要在'0x7fff'方法中传递callback函数。 find方法搜索数组中的元素，如果找到则返回该元素。否则返回find。搜索条件由回调函数定义。像

这样的东西

undefined

2。您可能不需要将您的innerHTML作为一个函数，而是指向像UserName Found这样有意义的信息更合适。

var simpson = users.find(currentValue => currentValue.last_name === "Simpson");

请尝试以下代码。

＆＃13;

document.getElementById("return").innerHTML = simpson.username;

＆＃13;

var users = [{"username":"nphillips7m","first_name":"Nicole","last_name":"Phillips","email":"nphillips7m@ebay.co.uk","gender":"Female","sexuality":"Networked static concept","language":"Gagauz"},
{"username":"esimpson7n","first_name":"Elizabeth","last_name":"Simpson","gender":"Female","sexuality":"Future-proofed solution-oriented definition","language":"Malay"},
{"username":"llawrence7o","first_name":"Lillian","last_name":"Lawrence","email":"llawrence7o@technorati.com","gender":"Female","sexuality":"Re-contextualized demand-driven middleware","language":"Tetum"}]

        var simpson = users.find(currentValue => currentValue.last_name === "Simpson");

        document.getElementById("return").innerHTML = simpson.username;

＆＃13;

Answer 2

您的代码中存在一些错误。首先，SELECT * FROM customers JOIN orders USING custID GROUP BY Name ORDER BY custID ASC;函数接受find函数作为参数。

callback

如果将函数传递给var simpson = users.find(a=>a.last_name=="Simpson");，则必须调用它，如下所示：

innerHTML

并且函数必须返回document.getElementById("return").innerHTML = (function myFunction(){ return JSON.stringify(simpson); })();才能设置value元素的HTML内容（内部HTML）。

＆＃13;

result

＆＃13;

var users = [{"username":"nphillips7m","first_name":"Nicole","last_name":"Phillips","email":"nphillips7m@ebay.co.uk","gender":"Female","sexuality":"Networked static concept","language":"Gagauz"},
{"username":"esimpson7n","first_name":"Elizabeth","last_name":"Simpson","gender":"Female","sexuality":"Future-proofed solution-oriented definition","language":"Malay"},
{"username":"llawrence7o","first_name":"Lillian","last_name":"Lawrence","email":"llawrence7o@technorati.com","gender":"Female","sexuality":"Re-contextualized demand-driven middleware","language":"Tetum"}]

var simpson = users.find(callback);
function callback(item){
    return item.last_name=="Simpson";
}
document.getElementById("return").innerHTML = (function myFunction(){
     return JSON.stringify(simpson);
})();

＆＃13;

显示文档

2 个答案: