大约有 30,000 项符合查询结果（耗时：0.0622秒） [XML]
SQL Server String or binary data would be truncated
...
As others have already said, one of your columns datatypes in the source table is larger than your destination columns.
A simple solution is to simply turn off the warning and allow truncation to take place. So, if you're receiving this error but yo...
Multiline strings in JSON
... control characters. As an additional example to make it more clear, consider that "\\" is an escape sequence for backslash, as opposed to a literal backslash. The JSON grammar explicitly excludes control characters (cf. the "char" definition), and instead provides for their representation via es...
Redirect From Action Filter Attribute
...redirect in an ActionFilterAttribute . I have an ActionFilterAttribute called IsAuthenticatedAttributeFilter and that checked the value of a session variable. If the variable is false, I want the application to redirect to the login page. I would prefer to redirect using the route name Syst...
Django - filtering on foreign key properties
...
student_user = User.objects.get(id=user_id)
available_subjects = Subject.objects.exclude(subject_grade__student__user=student_user) # My ans
enrolled_subjects = SubjectGrade.objects.filter(student__user=student_user)
context.update({'available_subjects': av...
What's the difference between an inverted index and a plain old index?
...hey arise. My question was: "why did the people who named inverted indexes call them inverted when we have a long standing tradition which calls them just plain indexes? For example, indexes at the end of books, as you point out, are actually inverted. Going by historical perspective, the indexes at...
how to put focus on TextBox when the form load?
...ents and double click the "Shown" event. In the form's shown event handler call the control.Focus() method.
private void myForm_Shown(object sender, EventArgs e)
{
// Call textbox's focus method
txtMyTextbox.Focus();
}
...
Why do you need to put #!/bin/bash at the beginning of a script file?
.../bin/perl or #!/bin/perl5.
PS:
The exclamation mark (!) is affectionately called "bang". The shell comment symbol (#) is sometimes called "hash".
PPS:
Remember - under *nix, associating a suffix with a file type is merely a convention, not a "rule". An executable can be a binary program, any one...
C fopen vs open
... that case it's even better to use pread instead of a seek/read pair (1 syscall instead of 2).
– Patrick Schlüter
May 5 '10 at 13:16
2
...
Does reading an entire file leave the file handle open?
...e, in an expression, and becomes inaccessible immediately after the read() call returns.
This means that the file object is garbage. The only remaining question is "When will the garbage collector collect the file object?".
in CPython, which uses a reference counter, this kind of garbage is notic...
Is it better to use C void arguments “void foo(void)” or not “void foo()”? [duplicate]
...eded - as with all function declarations that use identifier lists. So the caller has to know the types and the count precisely before-hand. So if the caller calls the function giving it some argument, the behavior is undefined. The stack could become corrupted for example, because the called functi...