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for each loop in Objective-C for accessing NSMutable dictionary
...
for (NSString* key in xyz) {
id value = xyz[key];
// do stuff
}
This works for every class that conforms to the NSFastEnumeration protocol (available on 10.5+ and iOS), though NSDictionary is one of the few collections which lets you enumerate keys...
Why would an Enum implement an Interface?
...ple here is wrong, since Enum already implements that. You can't even override it.
A better example is having an interface that defines, let's say, a data type. You can have an enum to implement the simple types, and have normal classes to implement complicated types:
interface DataType {
// met...
Best way to check if object exists in Entity Framework?
....
Here's an example of how to use it:
if (context.MyEntity.Any(o => o.Id == idToMatch))
{
// Match!
}
And in vb.net
If context.MyEntity.Any(function(o) o.Id = idToMatch) Then
' Match!
End If
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Is it possible to deserialize XML into List?
...c List<User> Items {get;set;}
}
public class User
{
[XmlElement("id")]
public Int32 Id { get; set; }
[XmlElement("name")]
public String Name { get; set; }
}
static class Program
{
static void Main()
{
XmlSerializer ser= new XmlSerializer(typeof(UserList));
...
The tilde operator in Python
...sentation of the integer are reversed (as in b <- b XOR 1 for each individual bit), and the result interpreted again as a twos-complement integer. So for integers, ~x is equivalent to (-x) - 1.
The reified form of the ~ operator is provided as operator.invert. To support this operator in your ...
CSS two divs next to each other
...out 200px; and the left <div> must fill up the rest of the screen width? How can I do this?
13 Answers
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Rails 3 migrations: Adding reference column?
...gration AddUserRefToProducts user:references
like you can see on rails guides
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How to replace a hash key with another key
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deep_transform_keys can be used for it :) apidock.com/rails/v4.2.1/Hash/deep_transform_keys
– gayavat
Nov 30 '15 at 6:28
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Can we pass parameters to a view in SQL?
..._emp (@pintEno INT)
RETURNS TABLE
AS
RETURN
SELECT * FROM emp WHERE emp_id=@pintEno;
This allows you to use it as a normal view, with:
SELECT * FROM v_emp(10)
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Socket.io rooms difference between broadcast.to and sockets.in
.... Also, every socket is automatically connected to their own room with the id socket.id (this is how private chat works in socketio, they use rooms).
Send to the sender and noone else
socket.emit('hello', msg);
Send to everyone including the sender(if the sender is in the room) in the room "my r...