Javascript枚举到相应的字符串值 [英] Javascript Enum To Corresponding String Value

问题描述

  var TEST_ERROR = {
'SUCCESS'： 0，
'FAIL'：-1，
'ID_ERROR'：-2 
}; 
  

并对网页上的功能执行测试：

  function test（）
 {
 //从DOM 
获取段落var testResultParagraph = document.getElementById（'testResult'） ; 
 
 //检查段落是否有效
 if（！testResultBox）
 {
 //更新网页
 testResultParagraph.value = TEST_ERROR.ID_ERROR ; 
返回TEST_ERROR.ID_ERROR; 
} 
 
 //存储结果的东西
 var testResult = TEST_ERROR.SUCCESS; 
 
 //测试计算
 testResult = testCalculate（）
 
 //更新网页
 testResultParagraph.value = testResult; 
 
 //测试成功
返回TEST_ERROR.SUCCESS; 
} 
  

testCalculate（）并且段落的值将为0，-1，-2取决于结果。

现在我想将其映射到一个字符串，以便该段落显示成功，失败或ID错误

我可以用几种方法来做到这一点：

  var TEST_ERROR = {
'SUCCESS'：{VALUE：0，STRING：'Success'}，
'FAIL'：{VALUE： -1，STRING：'Fail'}，
'ID_ERROR'：{VALUE：-2，STRING：'Id Error'}，
}; 
  

需要修改枚举点访问器，或

  var TEST_ERROR = {
'SUCCESS'：0，
'FAIL'：1，
'ID_ERROR'：2 
}; 
 
 var TEST_STRING = [
'Success'，
'Fail'，
'ID Error'
]; 
  

哪些需要更改逻辑（ result> TEST_ERROR.SUCCESS 似乎wierd tho！）

我的问题是你将如何将枚举值映射到JavaScript中的字符串值？强>我认为第二种方式是最明智的，但是希望枚举者对成功是积极的，否定失败。我也喜欢第一个包含对象结构中的字符串和值的想法。

任何想法？

谢谢！

Matt

PS。我将在网络工作者中进行测试，以使该页面不会挂起，结果将被放入表格中，而不是上面的段落。

PPS。我很喜欢Javascript编程，但在ASM，C，C ++，C＃中做了很多。

解决方案

你真的需要数值吗？如果没有，你可以使用这样的东西：

  var TEST_ERROR = {
 SUCCESS：'Success'，
 FAIL：'Fail'，
 ID_ERROR：'ID Error'
}; 
  

So I have this in the javascript for my page:

var TEST_ERROR  = {
        'SUCCESS'   :   0,
        'FAIL'      :   -1,
        'ID_ERROR'  :   -2
      };

And perform tests on functions in the page like so:

function test()
{
    // Get the paragraph from the DOM
    var testResultParagraph = document.getElementById('testResult');

    // Check the paragraph is valid
    if(!testResultBox)
    {
        // Update the web page
        testResultParagraph.value = TEST_ERROR.ID_ERROR;
        return TEST_ERROR.ID_ERROR;
    }

    // Something to store the results
    var testResult = TEST_ERROR.SUCCESS;

    // Test the calculation
    testResult = testCalculate()

    // Update the web page
    testResultParagraph.value = testResult;

    // The test succeeded
    return TEST_ERROR.SUCCESS;
}

The result of testCalculate() and the value of the paragraph will be either 0, -1, -2 depending on the outcome.

Now I want to map this to a string so that the paragraph shows 'Success', 'Fail' or 'ID Error'

I could do this a few ways I have figured:

var TEST_ERROR  = {
        'SUCCESS'   :   {VALUE : 0 , STRING: 'Success' },
        'FAIL'      :   {VALUE : -1, STRING: 'Fail'    },
        'ID_ERROR'  :   {VALUE : -2, STRING: 'Id Error'},
      };

would require a modification to the enum dot accessors, or

var TEST_ERROR  = {
        'SUCCESS'   :   0,
        'FAIL'      :   1,
        'ID_ERROR'  :   2
      };

var TEST_STRING = [
        'Success',
        'Fail',
        'ID Error'
      ];

Which would require changes to the logic (result > TEST_ERROR.SUCCESS seems wierd tho!)

My question is how would you go about mapping an enumerator value to a string value in Javascript? I'm thinking the second way is the most sensible, but would like the enumerator to be positive for successes and negative for fails. I also like the idea of the first containing the strings and values in the object structure.

Any ideas?

Thanks!

Matt

PS. I'm going to be doing the testing in a Web Worker, so that the page doesn't hang and the results will be put into a table, not a paragraph like above.

PPS. I'm pretty new to Javascript programming, but do a lot in ASM, C, C++, C#.

解决方案

Do you actually need the numeric values at all? If not then you could use something like this:

var TEST_ERROR  = {
    SUCCESS  : 'Success',
    FAIL     : 'Fail',
    ID_ERROR : 'ID Error'
};

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