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How to pass object with NSNotificationCenter
... when you do the addObserver(). The receiveTestNotification should only be called when observing a specific notification.
– Johan Karlsson
Feb 17 '16 at 15:06
1
...
When restoring a backup, how do I disconnect all active connections?
...ster
Go
Declare @dbname sysname
Set @dbname = 'databaseName'
Declare @spid int
Select @spid = min(spid) from master.dbo.sysprocesses
where dbid = db_id(@dbname)
While @spid Is Not Null
Begin
Execute ('Kill ' + @spid)
Select @spid = min(spid) from master.dbo.sysprocesses
wh...
Do sealed classes really offer performance Benefits?
...
The JITter will sometimes use non-virtual calls to methods in sealed classes since there is no way they can be extended further.
There are complex rules regarding calling type, virtual/nonvirtual, and I don't know them all so I can't really outline them for you, but...
What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
...ipsis.
The comma is purely optional; §8.3.5/4 does say
Where syntactically correct and where “...” is not part of an abstract-declarator, “, ...” is synonymous with “...”.
This is within an abstract-declarator, [edit] but Johannes makes a good point that they are referring to an ...
How to run only one task in ansible playbook?
...s
service: name=hadoop-0.20-mapreduce-jobtracker state=started
and now call use notify in hadoop_master.yml:
- name: Install the namenode and jobtracker packages
apt: name={{item}} force=yes state=latest
with_items:
- hadoop-0.20-mapreduce-jobtracker
- hadoop-hdfs-namenode
- hadoo...
Can I call a constructor from another constructor (do constructor chaining) in C++?
...
C++11: Yes!
C++11 and onwards has this same feature (called delegating constructors).
The syntax is slightly different from C#:
class Foo {
public:
Foo(char x, int y) {}
Foo(int y) : Foo('a', y) {}
};
C++03: No
Unfortunately, there's no way to do this in C++03, but t...
Connect Java to a MySQL database
...ot find the driver in the classpath!", e);
}
Note that the newInstance() call is not needed here. It's just to fix the old and buggy org.gjt.mm.mysql.Driver. Explanation here. If this line throws ClassNotFoundException, then the JAR file containing the JDBC driver class is simply not been placed i...
Should __init__() call the parent class's __init__()?
...
In Python, calling the super-class' __init__ is optional. If you call it, it is then also optional whether to use the super identifier, or whether to explicitly name the super class:
object.__init__(self)
In case of object, calling t...
Parse usable Street Address, City, State, Zip from a string [closed]
...nd/official-abbreviations.htm
– Mike Sherrill 'Cat Recall'
Jul 26 '11 at 21:48
17
"Only 50" was t...
Why is there no GIL in the Java Virtual Machine? Why does Python need one so bad?
...e GIL, wasn't there a ton of overhead with that (a factor of 2 is what I recall)?
– Bartosz Radaczyński
Jul 15 '09 at 13:57
10
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