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Query for documents where array size is greater than 1
... {$exists: false}},
{name: {$size: 0}},
{name: {$size: 1}}
]}
It means "all documents except those without a name (either non existant or empty array) or with just one name."
Test:
> db.test.save({})
> db.test.save({name: []})
> db.test.save({name: ['George']})
> db.test.save...
Can an ASP.NET MVC controller return an Image?
...h.Combine(dir, id + ".jpg"); //validate the path for security or use other means to generate the path.
return base.File(path, "image/jpeg");
}
As a note, this seems to be fairly efficient. I did a test where I requested the image through the controller (http://localhost/MyController/Image/MyIm...
What do the different readystates in XMLHttpRequest mean, and how can I use them?
...you to read the partial data.
readyState 4 is the only one that holds any meaning.
(*: about the only conceivable use I can think of for checking for readyState 3 is that it signals some form of life at the server end, so you could possibly increase the amount of time you wait for a full response ...
Add property to anonymous type after creation
...
I assume you mean anonymous types here, e.g. new { Name1=value1, Name2=value2} etc. If so, you're out of luck - anonymous types are normal types in that they're fixed, compiled code. They just happen to be autogenerated.
What you could d...
A python class that acts like dict
...nstead of simply delegating to the instance's __dict__ - which essentially means you're creating two dicts for every instance.
– Aaron Hall♦
Jan 8 '17 at 0:39
8
...
Struct Constructor in C++?
...ve created an anonymous struct and assigned it the alias "foo". This also means you will not be able to use "foo" with a scoping operator in a cpp file:
foo.h:
typedef struct{
int x;
void myFunc(int y);
} foo;
foo.cpp:
//<-- This will not work because the struct "foo" was never declared.
vo...
Parsing JSON giving “unexpected token o” error [duplicate]
... There's no such thing as a "JSON object". JSON is a string. What you mean is a "JS object".
– Joseph
Mar 25 '13 at 14:19
...
LPCSTR, LPCTSTR and LPTSTR
...he first part of your question:
LPCSTR is a pointer to a const string (LP means Long Pointer)
LPCTSTR is a pointer to a const TCHAR string, (TCHAR being either a wide char or char depending on whether UNICODE is defined in your project)
LPTSTR is a pointer to a (non-const) TCHAR string
In practi...
Html.Textbox VS Html.TextboxFor
...uce
<input id="Name" name="Name" type="text" />
So what does that mean in terms of use?
Generally two things:
The typed TextBoxFor will generate your input names for you. This is usually just the property name but for properties of complex types can include an underscore such as 'custome...
Mismatched anonymous define() module
...define() with no string ID") in its own script tag (I assume actually they mean anywhere in global scope)
You have modules that have conflicting names
You use loader plugins or anonymous modules but don't use require.js's optimizer to bundle them
I had this problem while including bundles built wi...