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ViewBag, ViewData and TempData
...uires typecasting for complex data type and check for
null values to avoid error.
ViewBag doesn’t require typecasting for complex data type.
ViewBag & ViewData Example:
public ActionResult Index()
{
ViewBag.Name = "Monjurul Habib";
return View();
}
public ActionResult Index()
{
...
Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...I built-in Flask . However, when I make the request, I get the following error:
9 Answers
...
Rails update_attributes without save?
..., :is_admin => true }) # Raises an ActiveModel::MassAssignmentSecurity::Error
user.assign_attributes({ :name => 'Bob'})
user.name # => "Bob"
user.is_admin? # => false
user.new_record? # => true
share...
How do I change read/write mode for a file using Emacs?
... and, if it returns 0, return the output as a string.
Otherwise, signal an error. The error message is the first line of the output."
(let ((output-buffer (generate-new-buffer "*stdout*")))
(unwind-protect
(let ((return-value (apply 'call-process command nil
output-bu...
How to check file MIME type with javascript before upload?
...xhr.onload = function() {
callback(url, xhr.response);
};
xhr.onerror = function() {
alert('A network error occurred!');
};
xhr.send();
}
function headerCallback(url, headerString) {
printHeaderInfo(url, headerString);
}
function remoteCallback(url, blob) {
printI...
Why use apparently meaningless do-while and if-else statements in macros?
...o() else (void)0 else { /* dangling else body */ }) triggers a compilation error. Here's a live example demonstrating it
– Chris Kline
Jul 27 '15 at 11:07
...
Why not infer template parameter from constructor?
...type of pm, is string.
Moreover, the following will always raise a compile error:
MyClass s(string("blah blah blah"));
MyClass i(3);
i = s;
This is because the declaration of the copy constructor is not templated:
MyClass(const MyClass&);
Here, the copy-constructor argument's template-type mat...
ImportError: No module named pip
...
With macOS 10.15 and Homebrew 2.1.6 I was getting this error with Python 3.7. I just needed to run:
python3 -m ensurepip
Now python3 -m pip works for me.
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improve this ...
Android - Start service on boot
...S boots. Unfortunately it is not starting on boot, and I'm not getting any errors. Maybe the experts can help...
7 Answers
...
How to install Xcode Command Line Tools
... "Xcode.SDKs" = (
);
};
version = "1.1.1";
}. Error: Error Domain=NSCocoaErrorDomain Code=3840 "The data couldn’t be read because it has been corrupted." (Encountered unknown ampersand-escape sequence at line 18) UserInfo=0x401bc8e60 {NSDebugDescription=Encountered unk...