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“static const” vs “#define” vs “enum”
...alternative.
If you really NEED to go with a macro (for example, you want __FILE__ or __LINE__), then you'd better name your macro VERY carefully: in its naming convention Boost recommends all upper-case, beginning by the name of the project (here BOOST_), while perusing the library you will notice...
Rails raw SQL example
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You can do this:
sql = "Select * from ... your sql query here"
records_array = ActiveRecord::Base.connection.execute(sql)
records_array would then be the result of your sql query in an array which you can iterate through.
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Convert stdClass object to array in PHP
I fetch post_id from postmeta as:
13 Answers
13
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Is nested function a good approach when required by only one function? [closed]
...
>>> def sum(x, y):
... def do_it():
... return x + y
... return do_it
...
>>> a = sum(1, 3)
>>> a
<function do_it at 0xb772b304>
>>> a()
4
Is this what you were looking for? It's called a closure.
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How to implement the factory method pattern in C++ correctly
...ude <memory>
class FactoryReleaseOwnership{
public:
std::unique_ptr<Foo> createFooInSomeWay(){
return std::unique_ptr<Foo>(new Foo(some, args));
}
};
// Factory retains object ownership
// Thus returning a reference.
#include <boost/ptr_container/ptr_vector.hpp&...
Constants in Objective-C
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You should create a header file like
// Constants.h
FOUNDATION_EXPORT NSString *const MyFirstConstant;
FOUNDATION_EXPORT NSString *const MySecondConstant;
//etc.
(you can use extern instead of FOUNDATION_EXPORT if your code will not be used in mixed C/C++ environments or on other plat...
Navigation bar appear over the views with new iOS7 SDK
... with this if: if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_6_1)
– Aviel Gross
Oct 14 '13 at 8:40
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Is the C# static constructor thread safe?
...class.
private class InitializerTest
{
static private int _x;
static public string Status()
{
return "_x = " + _x;
}
static InitializerTest()
{
System.Diagnostics.Debug.WriteLine("InitializerTest() starting.");
...
Recursive file search using PowerShell
...above mean is... ls -r -ea silentlycontinue -fo -inc "filename.txt" | % { $_.fullname }
– Andrew
Nov 4 '17 at 7:34
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Is it possible to make the -init method private in Objective-C?
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NS_UNAVAILABLE
- (instancetype)init NS_UNAVAILABLE;
This is a the short version of the unavailable attribute. It first appeared in macOS 10.7 and iOS 5. It is defined in NSObjCRuntime.h as #define NS_UNAVAILABLE UNAVAILABLE_...