如何使用 javascript 拆分字符串 - 将名字和姓氏与文本框分开

发布于 2024-11-06 09:45:28 字数 712 浏览 1 评论 0原文

我使用以下代码将姓氏与名字+中间名分开，并将它们放在三个单独的字段中。一个保存姓氏，一个保存名字，一个保存所有这些，但重新排列为姓氏，名字

function switchName(ele){
        var splitName = ele.value.split(" ");
        var surname = splitName[splitName.length-1]; //The last one
        var firstnames 
        for (var i=0; i < splitName.length-1; i++){
                firstnames += splitName[i] + " "
                }

    document.getElementById("hdnSNFNS").value = surname + ", " + firstnames;
    document.getElementById("hdnEmployeeSurname").value = surname;
    document.getElementById("hdnEmployeeFirst").value = firstnames;

它按原样工作，但我得到了名字的输出

石头，未定义乔斯·海伦

我已经使用它很长时间了，但无法偶然发现正确的解决方案。

原文

I'm using the following code to split up surname from first + middle names and place them in three seperate fields. One holds the surname, one holds the firstnames and one holds all of them but re-arranged as lastname, firstname(s)

function switchName(ele){
        var splitName = ele.value.split(" ");
        var surname = splitName[splitName.length-1]; //The last one
        var firstnames 
        for (var i=0; i < splitName.length-1; i++){
                firstnames += splitName[i] + " "
                }

    document.getElementById("hdnSNFNS").value = surname + ", " + firstnames;
    document.getElementById("hdnEmployeeSurname").value = surname;
    document.getElementById("hdnEmployeeFirst").value = firstnames;

It works as is but I get this output for the firstnames

Stone, undefinedJoss Helen

I've played around with it for ages but cant stumble across the correct solution.

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十级心震 2024-11-13 09:45:28

第 4 行缺少 ;，您应该将 firstnames 初始化为空字符串。

var 名字 = "";。

现在，循环的第一次迭代将第一个名称连接到一个未初始化的变量，这就是 undefined 的来源。通过初始化，您将与“nothing”连接，它将产生预期的结果。

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南城追梦 2024-11-13 09:45:28

function switchName(ele){
    var splitName = ele.value.split(" ");
    var surname = splitName[splitName.length-1]; //The last one
    var firstnames = ""; // <- forgot to initialize to an empty string
    for (var i=0; i < splitName.length-1; i++){
        firstnames += splitName[i] + " "
    }
}

function switchName(ele){
    var splitName = ele.value.split(" ");
    var surname = splitName[splitName.length-1]; //The last one
    var firstnames = ""; // <- forgot to initialize to an empty string
    for (var i=0; i < splitName.length-1; i++){
        firstnames += splitName[i] + " "
    }
}

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