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Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
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2 Answers
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Mockito match any class argument
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192
Two more ways to do it (see my comment on the previous answer by @Tomasz Nurkiewicz):
The first...
MYSQL Dump only certain rows
...tion. It should be a valid SQL WHERE clause, like:
--where="date_pulled='2011-05-23'"
You have the column name outside of the quotes.
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What is the simplest way to get indented XML with line breaks from XmlDocument?
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210
Based on the other answers, I looked into XmlTextWriter and came up with the following helper ...
Best way to check for “empty or null value”
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297
The expression stringexpression = '' yields:
TRUE .. for '' (or for any string consisting o...
Checking if a folder exists (and creating folders) in Qt, C++
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227
To check if a directory named "Folder" exists use:
QDir("Folder").exists();
To create a new...
Apply multiple functions to multiple groupby columns
....418500 0.030955 0.874869 0.145641 0
1 0.446069 0.901153 0.095052 0.487040 0
2 0.843026 0.936169 0.926090 0.041722 1
3 0.635846 0.439175 0.828787 0.714123 1
A dictionary mapped from column names to aggregation functions is still a perfectly good way to perform an...
Types in Objective-C on iOS
...nkey.org/programming_languages/objective-c/types.html
or run this code:
32 bit process:
NSLog(@"Primitive sizes:");
NSLog(@"The size of a char is: %d.", sizeof(char));
NSLog(@"The size of short is: %d.", sizeof(short));
NSLog(@"The size of int is: %d.", sizeof(int));
NSLog(@"The size of...
In CMake, how can I test if the compiler is Clang?
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249
A reliable check is to use the CMAKE_<LANG>_COMPILER_ID variables. E.g., to check the C+...
C++ Build Systems - What to use? [closed]
...w. And, it's slow.
It makes me ill to think that a decade after the Year 2000, we still don't have flying cars. We'll probably have to wait another hundred years or something to get them. And, we will then all probably be flying around in our flying cars that are still being constructed with cra...