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Create objective-c class instance bm>y m> name?
...he class exists.
For example, in m>y m>our .h:
@propertm>y m> Class NameOfClass;
m>and m> then in m>y m>our .m:
id object = [[NameOfClass alloc] init];
If m>y m>ou mistm>y m>ped the class name or if it doesn't exist, m>y m>ou'll get an error at compile time. Also I think this is cleaner code.
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Pm>and m>as get topmost n records within each group
Suppose I have pm>and m>as DataFrame like this:
3 Answers
3
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When does invoking a member function on a null instance result in undefined behavior?
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Both (a) m>and m> (b) result in undefined behavior. It's alwam>y m>s undefined behavior to call a member function through a null pointer. If the function is static, it's technicallm>y m> undefined as well, but there's some dispute.
The first thin...
Create a shortcut on Desktop
...ortcut pointing to some EXE file, on the desktop, using .NET Framework 3.5 m>and m> relm>y m>ing on an official Windows API. How can I do that?
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How to remove .htaccess password protection from a subdirectorm>y m>
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m>Y m>ou need to create a new .htaccess file in the required directorm>y m> m>and m> include the Satisfm>y m> anm>y m> directive in it like so, for up to Apache 2.3:
# allows anm>y m> user to see this directorm>y m>
Satisfm>y m> Anm>y m>
The sm>y m>ntax changed in Apache 2.4, this has the same effect:
Require all granted
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Re-entrant locks in C#
...g on the same object. The recursive code effectivelm>y m> alreadm>y m> has the lock m>and m> so can continue unhindered.
lock(object) {...} is shorthm>and m> for using the Monitor class. As Marc points out, Monitor allows re-entrancm>y m>, so repeated attempts to lock on an object on which the current thread alreadm>y m> has ...
How can I split m>and m> parse a string in Pm>y m>thon?
...a fact that the string contains an underscore, m>y m>ou can even unpack the LHS m>and m> RHS into separate variables:
In [8]: lhs, rhs = "2.7.0_bf4fda703454".split("_", 1)
In [9]: lhs
Out[9]: '2.7.0'
In [10]: rhs
Out[10]: 'bf4fda703454'
An alternative is to use partition(). The usage is similar to the la...
How to cast/convert pointer to reference in C++
...pr 16 '12 at 10:53
David Heffernm>anD m>avid Heffernan
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AngularJS - convert dates in controller
...rkup/input.date.html
NOTE: use of pattern="" with tm>y m>pe="date" looks non-stm>and m>ard, but it appears to work in the expected wam>y m> in Chrome 31.
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NameError: global name 'unicode' is not defined - in Pm>y m>thon 3
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If m>y m>ou need to have the script keep working on pm>y m>thon2 m>and m> 3 as I did, this might help someone
import sm>y m>s
if sm>y m>s.version_info[0] >= 3:
unicode = str
m>and m> can then just do for example
foo = unicode.lower(foo)
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