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What does -D_XOPEN_SOURCE do/mean?
...t gcc would not compile without this arg. I checked the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does.
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How do I pass parameters to a jar file at the time of execution?
...so if no arguments are specified it will continue anyway:
public static void main(String[] args) {
try {
String one = args[0];
String two = args[1];
}
catch (ArrayIndexOutOfBoundsException e){
System.out.println("ArrayIndexOutOfBoundsException caught");
}
...
Get name of current class?
... I need to create and initialize a class variable, 'input', outside of a method. I have a bunch of small classes, each which must call 'get_input' using their class name as the parameter. I am trying to generalize this so I don't have to go to each class (there will be 100 or so) and ty...
Calling constructor from other constructor in same class
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The order of constructor evaluation must also be taken into consideration when chaining constructors:
To borrow from Gishu's answer, a bit (to keep code somewhat similar):
public Test(bool a, int b, string c)
: this(a, b)
{
this.C = c;
}
private Test(bool a, int b)
{
this.A...
jQuery: Selecting by class and input type
... ugly, as most of the time I expect : style selectors to come last. As I said, though, either one will work.
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How to use php serialize() and unserialize()
...mplex data structure cannot be transported or stored or otherwise used outside of a running PHP script. If you want to persist such a complex data structure beyond a single run of a script, you need to serialize it. That just means to put the structure into a "lower common denominator" that can be h...
Specify multiple attribute selectors in CSS
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span[hello="Cleveland"][goodbye="Columbus"] { color: blue; }
As a side note, using quotation marks around an attribute value is required only if this value is not a valid identifier.
JSFiddle Demo
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How to enable C++11 in Qt Creator?
...or yourself in the edit histories. Given this information, would you reconsider your downvote?
– Ali
Aug 21 '14 at 15:23
3
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Is there a way to pass the DB user password into the command line tool mysqladmin?
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Warning: this is considered insecure: dev.mysql.com/doc/mysql-security-excerpt/5.7/en/…
– neverendingqs
Jul 26 '16 at 20:22
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How to cache data in a MVC application
...eKey, Func<T> getItemCallback) where T : class;
}
Usage:
cacheProvider.GetOrSet("cache key", (delegate method if cache is empty));
Cache provider will check if there's anything by the name of "cache id" in the cache, and if there's not, it will call a delegate method to fetch data and sto...