javascript - Google 脚本字符串以 ... 结尾，然后未定义

Question

我确定我的问题有一个非常基本的原因，我希望你能指出:) 我遇到的问题是一个字符串在创建线上显示为以“...”结尾，但是当继续下一行变成“未定义”。这是一个例子：

var string1 = "sdfsdfsdfsdfsdfsdfsfsfsfsdfsdfsdfsdfsdfsdfsfasdfasfasdflkjasldflasdkjflaksdjflasjdflaksjdflasdkjf";
var string2 = "sdfgsdfglksjdflgkjsdlfgkjlsdfgkjlsdkgjlkajsdlfkjladskjflakjdsflkajsdlfkjasdlfkjalsdkfjlaskdjflkasjdf";
var string3 = "sdfglksfdjlgkjsldfgkjlsdfkjglsdfkjglsdkfjglsdkjglsdkgjlsdfkjglsdkfjglsdkfjglsdkjglsdkfjglsdkfjglskfdjglsdkjfg";
var string = string1.concat(string2,string3); // debug breakpoint at this line shows the string as ending with ...
var length = string.length(); // debug breakpoint here shows "string" as undifiend but length apears to be working fine.

我在此字符串上运行的任何其他函数都会返回错误，因为该字符串未定义。想法？

标签： javascriptstringgoogle-apps-script

Answer 1

错误不是string未定义的。这string.length()是未定义的。

length()字符串在 javascript 中没有函数。他们有一个财产.length。您看到的省略号...可能只是您的控制台截断了控制台输出，但整个字符串仍然存在。见下文。

var string1 = "sdfsdfsdfsdfsdfsdfsfsfsfsdfsdfsdfsdfsdfsdfsfasdfasfasdflkjasldflasdkjflaksdjflasjdflaksjdflasdkjf";
var string2 = "sdfgsdfglksjdflgkjsdlfgkjlsdfgkjlsdkgjlkajsdlfkjladskjflakjdsflkajsdlfkjasdlfkjalsdkfjlaskdjflkasjdf";
var string3 = "sdfglksfdjlgkjsldfgkjlsdfkjglsdfkjglsdkfjglsdkjglsdkgjlsdfkjglsdkfjglsdkfjglsdkjglsdkfjglsdkfjglskfdjglsdkjfg";
var string = string1.concat(string2,string3); // debug breakpoint at this line shows the string as ending with ...
var length = string.length; // debug breakpoint here shows "string" as undifiend but length apears to be working fine.
console.log(string);
console.log(length);

参考：

• 字符串长度