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What is the best way to do a substring in a batch file?
...on, substitution of FOR
variable references has been enhanced.
You can now use the following optional
syntax:
%~I - expands %I removing any surrounding quotes (")
%~fI - expands %I to a fully qualified path name
%~dI - expands %I to a drive letter only
%~pI - expa...
Simple way to copy or clone a DataRow?
...o following steps, then I clear the datatable that contains source row and now I have a source row with blank fields.
– Sergеу Isupov
Oct 9 '15 at 6:58
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Why do I need Transaction in Hibernate for read-only operations?
...nd rolling back the transaction work out to be the same (and very cheap).
Now, if you're lucky and your queries against the DB are such that the ORM always maps them to single SQL queries, you can get away without explicit transactions, relying on the DB's built-in autocommit behavior, but ORMs are...
What is the difference between self::$bar and static::$bar in PHP?
...d PHP for the self variable, which in turn asks for Foos variable instead.
Now if we swap the call with static, we will instead get Bars overridden value:
With static call:
class Foo
{
protected static $var = 123;
public function getVar()
{
return static::$var;
}
}
clas...
What components are MVC in JSF MVC framework?
...The managed bean class can also contain the business logic.These are also known as backing beans which can have different scopes like request, session, application.
View - The user interface shown to the client i.e. .xhtml files. It gets the data from the managed beans and it is rendered as the resp...
How to get box-shadow on left & right sides only
...
@Hamish Yeah, that's what I did for now :-) Pity, one appealing feature of this approach is that it (usually) does not requre any helper <div> elements. :-)
– Frerich Raabe
Nov 11 '19 at 16:15
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Which Boost features overlap with C++11?
I put my C++ skills on the shelf several years ago and it seems now, when I need them again, the landscape has changed.
2 A...
Parsing command-line arguments in C?
...
To my knowledge, the three most popular ways how to parse command line arguments in C are:
Getopt (#include <unistd.h> from the POSIX C Library), which can solve simple argument parsing tasks. If you're a bit familiar with b...
C# Thread safe fast(est) counter
...ther CPU from accessing the bus while the calling CPU does its operation. Now, take a look at the C# lock() statement's IL. Here you will see calls to Monitor in order to begin or end a section.
In other words, .Net lock() statement is doing a lot more than the .Net Interlocked.Increment.
SO, ...
Java regex email
First of all, I know that using regex for email is not recommended but I gotta test this out.
20 Answers
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