throw

来源： https://stackoverflow.com/questions/63456569/how-could-i-throw-an-error-when-response-data-does-not-contain-an-object-to-deco

来源： https://stackoverflow.com/questions/63456569/how-could-i-throw-an-error-when-response-data-does-not-contain-an-object-to-deco

问题 I've been searching for some time now, and I'm sure I've missed it, is there any documentation that states what should be thrown when a value is incorrect/blank? For example, Python has ValueError and the documentation clearly states when to use it. I have the following method: proc getJobinfo {question} { puts -nonewline "$question: " flush stdout gets stdin answer set cleanedanswer [string trim [string totitle $answer]] if {$cleanedanswer eq ""} { # What error should be thrown? } return

问题 I've seen 3 different ways of throwing an error in JavaScript: throw 'message'; throw Error('message'); throw new Error('message'); What is the difference between them? Note: I am aware of similar questions (1,2,3, etc). None of them cover all three cases. 回答1: throw is an expression which halts the function and generates an exception. Whatever directly follows throw is passed along in the exception. Think of it as a function with syntax sugar, so instead of writing throw('message') you write

问题 I have created my own type of exception and want to implement it in a method. As of now I have written it in the following way, and it works. public Worker remove (String firstName, String lastName, String number) throws NoSuchEmployeeException { Worker w = null; for (int i = 0; i < list.size(); i++) { if (list.get(i).getFirstName().compareTo(firstName) == 0 && list.get(i).getLastName().compareTo(lastName) == 0 && list.get(i).getNumber().compareTo(number) == 0) { w = list.get(i); list.remove

问题 I am interested to know best practice to use throw new Exception() and new Exception() . In case of using new Exception() , I have seen that code moves to next statement instead of throwing exception. But I am told that we should use new Exception() to throw RuntimeException . Can anyone throw some light on this ? 回答1: new Exception() means create an instance (same as creating new Integer(...)) but no exception will happen until you throw it... Consider following snippet: public static void

问题 I am interested to know best practice to use throw new Exception() and new Exception() . In case of using new Exception() , I have seen that code moves to next statement instead of throwing exception. But I am told that we should use new Exception() to throw RuntimeException . Can anyone throw some light on this ? 回答1: new Exception() means create an instance (same as creating new Integer(...)) but no exception will happen until you throw it... Consider following snippet: public static void

问题 Is there a difference in writing: throw SomeException; and throw(SomeException); I have seen some sources that claim the latter (with parentheses) is not a good option for some reason but alas I can not recall where I've seen this. 回答1: There should not be any functionality difference between the two expressions apart from the parentheses. I have never heard of any clear reason that says why one should be superior to the other. To me the first option looks more intuitive as it does not

问题 Is there a difference in writing: throw SomeException; and throw(SomeException); I have seen some sources that claim the latter (with parentheses) is not a good option for some reason but alas I can not recall where I've seen this. 回答1: There should not be any functionality difference between the two expressions apart from the parentheses. I have never heard of any clear reason that says why one should be superior to the other. To me the first option looks more intuitive as it does not

问题 Is there a difference in writing: throw SomeException; and throw(SomeException); I have seen some sources that claim the latter (with parentheses) is not a good option for some reason but alas I can not recall where I've seen this. 回答1: There should not be any functionality difference between the two expressions apart from the parentheses. I have never heard of any clear reason that says why one should be superior to the other. To me the first option looks more intuitive as it does not