Javascript未定义的值 [英] Javascript undefined value

问题描述

  var  myArray = []; 
 myArray = [  Tayfur Gazioglu，   tayfurgazioglu]; 
 
 
  function  cutName（name）
 {
 
  var  cut = name [ 0 ]。split（ ）; 
  return  cut; 
} 
 
  var  myInfo = {
 fullName：cutName [myArray]，
 skype：myArray [  1 ]，
 github：'  tayfurgazioglu'  
}; 
 
  document  .write（myInfo.fullName）; 

我尝试过：



函数cutName有问题！我试过没有这个功能的同样的东西，它的工作原理。但是，当我尝试这样的document.write（myInfo.fullName）;未定义。

解决方案

 fullName：cutName [myArray] 

你打电话这个功能错误的方式。让我们坚持基础并称之为这样的事情

 fullName：cutName（myArray [ 0 ]） 

更正

 function cutName（name）{
 
 var cut = name [0] .split（）[0]; 
退货; 
} 
 

 fullName：cutName（myArray），
 

其他CP成员已经指出了调用该函数的正确方法是

 fullName： cutName（myArray）

我想要输入的另一个提示是全名格式化，这样函数将返回Firsname，Lastname VS名字，姓氏



<前lang =Javascript> 返回 cut [ 0 ] + ' ，' + cut [< span class =code-digit> 1 ];
// cut [1] +'，'+ cut [0];
// cut [0] +''+ cut [1]

或者，这个方法，你没有控制来安排名字。

  return  cut.join（ ，）; 
  //   cut.join（）;  

示例：



cutname - JSFiddle [ ^ ]

var myArray = [];
myArray = ["Tayfur Gazioglu", "tayfurgazioglu"];


function cutName(name)
{

   var cut = name[0].split(" ");
  return cut;
}

var myInfo = {
fullName : cutName[myArray],
skype : myArray[1],
github : 'tayfurgazioglu'
};

document.write(myInfo.fullName);

What I have tried:

There is something wrong with the function cutName! I tried the samething without the function, it works. But when i try like this the value of document.write(myInfo.fullName); is undefined.

解决方案

fullName : cutName[myArray]

you are calling this function in wrong way. lets stick to the basics and call it something like this

fullName : cutName(myArray[0])

correction

function cutName(name) {

           var cut = name[0].split(" ")[0];
           return cut;
       }

fullName: cutName(myArray),

Other CP members already pointed it out the correct way to call the function is

fullName : cutName(myArray)

Another tip I wanted to throw in is the full name formatting, this way the function will return "Firsname, Lastname" VS "Firstname,Lastname"

return cut[0] + ', ' + cut[1]; 
//cut[1] + ', ' + cut[0];
//cut[0] + ' ' + cut[1]

OR, this method, you don't have the control to arrange the name.

return cut.join(", ");
//cut.join(" "); 

Example:

cutname - JSFiddle[^]

这篇关于Javascript未定义的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！