大约有 15,590 项符合查询结果（耗时：0.0311秒） [XML]
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
...
Only throw an exception if it is truly an error. If it is expected behavior for the object to not exist, return the null.
Otherwise it is a matter of preference.
share
|
...
Undefined method 'task' using Rake 0.9.0
...version ( 0.9.0.beta.4 ) and the rake command ends up with the following error message:
8 Answers
...
Test if something is not undefined in JavaScript
I'm checking if(response[0].title !== undefined) , but I get the error:
11 Answers
11...
Why is this program erroneously rejected by three C++ compilers?
...haracter set), so it cannot move into further processing stages, hence the error. It is entirely possible that your compiler support a mapping from image to basic source character set, but is not required to.
Since this mapping is implementation-defined, you'll need to look at your implementations...
“ClickOnce does not support the request execution level 'requireAdministrator.'”
...other touches, such as a description or name.
Out of the blue, I get an error that will not go away. ClickOnce does not support the request execution level 'requireAdministrator'. Now, I hadn't touched ClickOnce in this application. All I had done was include a manifest file requesting these pe...
AngularJS passing data to $http.get request
... called asynchronously // when the response is available }). error(function(data, status, headers, config) { // called asynchronously if an error occurs // or server returns response with an error status. });
– Ehud Grand
Sep 1 '14...
typecast string to integer - Postgres
...er as well as to_number(<column_name>,'9999999') but I am getting errors, as there are a few empty fields, I need to retrieve them as empty or null into the new table.
...
Error in SQL script: Only one statement is allowed per batch
...eployment, but when I try to build the VS project for 3 of them I get this error:
3 Answers
...
Redirect all output to file [duplicate]
...dirlist" directs only the standard output to dirlist, because the standard error was duplicated from the standard output before the standard output was redirected to dirlist" :)
– shelleybutterfly
Jul 13 '11 at 5:33
...