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How to copy an object in Objective-C
.... You call copyWithZone on all your fields, to make a deep copy. A simple em>x m>ample is
@interface YourClass : NSObject <NSCopying>
{
SomeOtherObject *obj;
}
// In the implementation
-(id)copyWithZone:(NSZone *)zone
{
// We'll ignore the zone for now
YourClass *another = [[YourClass all...
C/C++ macro string concatenation
... the statement above and observe that the program fragment
#define PPCAT_Nm>X m>(A, B) A ## B
PPCAT_Nm>X m>("s", "1")
produces this error message from the preprocessing phase of gcc: error: pasting ""s"" and ""1"" does not give a valid preprocessing token
]
However, for general token pasting, try this:
...
Parallel.ForEach vs Task.Factory.StartNew
... out Microsoft's Patterns of Parallel Programming article; it's got great em>x m>planations of all of this stuff in it.
– Mal Ross
Feb 17 '11 at 14:37
2
...
How do I squash two non-consecutive commits?
... squash D into A.
Git will open an editor, and you see a file like this, em>x m>: git rebase --interactive HEAD~4
pick aaaaaaa Commit A
pick bbbbbbb Commit B
pick ccccccc Commit C
pick ddddddd Commit D
# Rebase aaaaaaa..ddddddd onto 1234567 (4 command(s))
#
# Commands:
# p, pick = use commit
# r, rewo...
Rollback to an old Git commit in a public repo
...is:
git checkout [revision] .
where [revision] is the commit hash (for em>x m>ample: 12345678901234567890123456789012345678ab).
Don't forget the . at the end, very important. This will apply changes to the whole tree. You should em>x m>ecute this command in the git project root. If you are in any sub dir...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
... string value = "Hello World!";
MockFoo mockFoo;
Em>X m>PECT_CALL(mockFoo, getArbitraryString()).Times(1).
WillOnce(Return(value));
string returnValue = mockFoo.getArbitraryString();
cout << "Returned Value: " << returnValue << endl;
...
Rails: Default sort order for a rails model?
...u need this instead:
default_scope order('created_at DESC')
For Rails 2.m>x m>:
default_scope :order =&gt; 'created_at DESC'
Where created_at is the field you want the default sorting to be done on.
Note: ASC is the code to use for Ascending and DESC is for descending (desc, NOT dsc !).
scope...
SQLAlchemy: Creating vs. Reusing a Session
... to your DB. For me that means the second I would do my first session.add(m>x m>) or something similar, I would first do
2 Ans...
How to stop mongo DB in one command
...
Starting and Stopping MongoDB is covered in the MongoDB manual. It em>x m>plains the various options of stopping MongoDB through the shell, cli, drivers etc. It also details the risks of incorrectly stopping MongoDB (such as data corruption) and talks about the different kill signals.
Additionall...
What's the Best Way to Shuffle an NSMutableArray?
...
You don't need the swapObjectAtIndem>x m> method. em>x m>changeObjectAtIndem>x m>:withObjectAtIndem>x m>: already em>x m>ists.
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