Question

<html>
<body>

//我的文字区域

<textarea id="emailTextarea" rows ="30" cols="30" >
sara@yahoo.com
adam@yahoo.com
todd@yahoo.com
henry@yahoo.com
wright@yahoo.com
</textarea>

<p id="demo"></p>

<script>

//从textarea获取电子邮件列表的输入

    //The email list
    var emailList = document.getElementById("emailTextarea").value;

//删除yahoo扩展程序的功能

    //remove the extension
    var emailUserHash = emailList.reduce(function(emailUsers, email, i) {
        var username = email.slice(0, email.indexOf('yahoo.com'));
        if(!emailUsers[username]) emailUsers[username] = true;
        return emailUsers;
    }, {});

//调用emailUserHash函数

    //call the emailUserHash function
    var emailUsers = Object.keys(emailUserHash)

//对电子邮件列表进行排序

    //sort the email list
    emailUsers.sort();

//打印列表

    //output the list
    document.write(emailUsers.join('</br>'));
    </script>
</body>

Answer 1

认为这可能是你想要完成的事情：

var emailList = document.getElementById("emailTextarea").value;
var emailListArray = emailList.split("\n");

var usernamesArray = emailListArray.map(function(val, index, arr) {
    return val.slice(0, val.indexOf('@yahoo.com'));
});

var sortedUsernames = usernamesArray.sort();

document.write(sortedUsernames.join('</br>'));

这将输出已排序并删除了@ yahoo.com的电子邮件用户名列表

Answer 2

您应该将textarea解析为数组。

我用JQuery做了示例：https://jsfiddle.net/k8te23mf/

var arrayOfLines = $('#emailTextarea').val().split('@yahoo.com\n');
$('#demo').append(arrayOfLines+', ');

从textarea获取输入以进行排序和打印。我正在获取数据，但无法排序或打印出来。

2 个答案: