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What exactly does an #if 0 … #endif block do?
In C /C++
9 Answers
9
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Get URL query string parameters
....
For example, if the URL is http://www.example.com/page.php?x=100&y=200, the code
$queries = array();
parse_str($_SERVER['QUERY_STRING'], $queries);
will store parameters into the $queries array ($queries['x']=100, $queries['y']=200).
Look at documentation of parse_str
EDIT
According ...
Why does C++ rand() seem to generate only numbers of the same order of magnitude?
In a small application written in C/C++, I am facing a problem with the rand function and maybe the seed :
9 Answers
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Can I zip more than two lists together in Scala?
...._1))
}
For example:
combineLists(List(1, 2, 3), List(10,20), List(100, 200, 300))
// => List[List[Int]] = List(List(1, 10, 100), List(2, 20, 200))
The answer is truncated to the size of the shortest list in the input.
combineLists(List(1, 2, 3), List(10,20))
// => List[List[Int]] = List...
Key existence check in HashMap
...o the key (the name of the bank account). To add 2 transactions of 100 and 200 to checking_account you can write:
HashMap<String, ArrayList<Integer>> map = new HashMap<>();
map.computeIfAbsent("checking_account", key -> new ArrayList<>())
.add(100)
.add(200);
This...
Get DateTime.Now with milliseconds precision
...date time with milliseconds: var dt = new DateTime(2018, 5, 2, 19, 34, 55, 200); "{0:yyyyMMdd HH:mm:ss.fff}", dt -> 20180502 19:34:55.200 .Net compact framework, Windows Embedded Compact 7, on ARM Cortex-A8
– antonio
Feb 5 '18 at 11:23
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What does a colon following a C++ constructor name do? [duplicate]
What does the colon operator (":") do in this constructor? Is it equivalent to MyClass(m_classID = -1, m_userdata = 0); ?
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How to stretch the background image to fill a div
...size:100% 100%;
background-size:100% 100%;
height:180px;
width:200px;
border: 1px solid red;
}
Check this: http://jsfiddle.net/qdzaw/1/
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What is the lifetime of a static variable in a C++ function?
...2
Created in foo
Created in if
Destroyed in if
Destroyed in foo
[0] Since C++98[2] has no reference to multiple threads how this will be behave in a multi-threaded environment is unspecified, and can be problematic as Roddy mentions.
[1] C++98 section 3.6.3.1 [basic.start.term]
[2] In C++11 statics...
How would one write object-oriented code in C? [closed]
...ymorphism then yes, you can, we were doing that sort of stuff years before C++ came about.
Basically you use a struct to hold both the data and a list of function pointers to point to the relevant functions for that data.
So, in a communications class, you would have an open, read, write and close...