The biggest issue with this code is that you're not telling the user what went wrong if an error occurs.

该代码最大的问题是如果出现错误不能告知用户是什么错误。

youdao

The function returns an error or success code; if it's an error code, the code itself can be used to figure out what went wrong.

函数返回错误代码或成功代码；如果是错误代码，则代码本身可用于指出何处出错。

youdao

If the error is viewed in ie, it generally will make no sense what so ever and add to your frustration.

如果在IE中查看错误，一般看不出任何意义，增加了难度。

youdao

So this is the percent error and what you see here is that if the number is below the zero line it means people underestimated the calories, and the bars that go above means people overestimated the calories.

这是百分比误差,你们看,如果数字低于零,这表示人们低估了卡路里,高于零表示人们高估了卡路里

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If the answer is no, then the PAO must be dogged about getting it fixed if needed or at least let the reporter know what was in error for their education.

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The app lets you know what the error code means and if it's a serious problem, it'll bring up a map of nearby auto shops along with their Yelp ratings.

ENGADGET: Automatic Link connects phone and car for better driving, we go hands-on (video)

"I think Dick Gephardt has made a real error in calculating his possibilities for the year 2000 if that's what he's doing, " Kemp said, referring to Gephardt's recent attacks on the budget deal and extending most-favored-nation trade status to China.

CNN: AllPolitics - Kemp And 2000