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Deep null checking, is there a better way?
...on is ParameterExpression))
throw new ApplicationException(String.Format("The expression '{0}' contains unsupported constructs.",
expression));
object a = arg;
while(stack.Count > 0)
...
Ruby: kind_of? vs. instance_of? vs. is_a?
....is_a? Object and "hello".kind_of? Object return true because "hello" is a String and String is a subclass of Object.
However "hello".instance_of? Object returns false.
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ASP.NET MVC: Is Controller created for every request?
...er == null)
{
throw new InvalidOperationException(
String.Format(
CultureInfo.CurrentCulture,
MvcResources.ControllerBuilder_FactoryReturnedNull,
factory.GetType(),
controllerName));
}
}
Here's the Controll...
How to get a DOM Element from a JQuery Selector
...
I needed to get the element as a string.
jQuery("#bob").get(0).outerHTML;
Which will give you something like:
<input type="text" id="bob" value="hello world" />
...as a string rather than a DOM element.
...
How do sessions work in Express.js with Node.js?
...connect-redis).
Details
Express.js/Connect creates a 24-character Base64 string using utils.uid(24) and stores it in req.sessionID. This string is then used as the value in a cookie.
Client Side
Signed cookies are always used for sessions, so the cookie value will have the following format.
[si...
LINQ to SQL - Left Outer Join with multiple join conditions
...ollows:
public static IEnumerable<Announcementboard> GetSiteContent(string pageName, DateTime date)
{
IEnumerable<Announcementboard> content = null;
IEnumerable<Announcementboard> addMoreContent = null;
try
{
content = from c in DB.Announcementb...
Python how to write to a binary file?
...eorder='big'))
I.e., each single call to to_bytes in this case creates a string of length 1, with its characters arranged in big-endian order (which is trivial for length-1 strings), which represents the integer value byte. You can also shorten the last two lines into a single one:
newFile.write(...
Are there benefits of passing by pointer over passing by reference in C++?
...inter types is not possible (pointers are builtin types). So you can't do string s = &str1 + &str2; using pointers.
No 0 values possible -> Called function doesn't have to check for them
Reference to const also accepts temporaries: void f(const T& t); ... f(T(a, b, c));, pointers ca...
How do you do a case insensitive search using a pattern modifier using less?
...ummon this feature on a per search basis like so:
less prompt> /search string/-i
This option is in less's interactive help which you access via h:
less prompt> h
...
-i ........ --ignore-case
Ignore case in searches that do not contain uppercase.
-I ........ --IGN...
How can a time function exist in functional programming?
... the new action. For instance, let's pretend there is a function now :: IO String, which returns a String representing the current time. We can chain it with the function putStrLn to print it out:
now >>= putStrLn
Or written in do-Notation, which is more familiar to an imperative programmer...