使用qr码输出需要较少的错误检查。

Using the QR code output requires much less error checking.

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为了增加更健壮的错误处理并尽量避免过于复杂，可以增加一两个状态码检查，请看一看清单15中修改后的updatePage()版本。

To add more robust error handling -- with minimal complication -- you might add a check or two for other status codes; check out the modified version of updatePage() in Listing 15.

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一种用于检查一组字符的错误、并且具有最小冗余度的循环码。

A cyclic code with minimum redundancy used to check errors in a set of characters.

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不过，其他类型的错误则会要求您侦错程序码，即在程序码执行期间对其进行检查，以验证执行路径和资料是正确的。

However, other types of errors require that you debug your code - that is, that you examine the code while it is running to validate that the execution path and data is as it should be.

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通常人们很容易忘记检查名称或者使用方括弧，而如此将会在您的程序码中产生错误并使它更难以阅读。

It can be easy to forget to qualify names or include square brackets, and thus introduce errors into your code and make it harder to read.

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您可以透过检查范围并拒绝程序码无法处理的任何输入，以修正这些错误。

You can fix these bugs through range checking and rejecting any input the code cannot handle.

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您可以透过检查范围并拒绝程序码无法处理的任何输入，以修正这些错误。

You can fix these bugs through range checking and rejecting any input the code cannot handle.

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