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What is the __del__ method, How to call it?
...s sense. If you need to use __del__, be aware of the basic limitations per http://docs.python.org/reference/datamodel.html:
__del__ is called when the garbage collector happens to be collecting the objects, not when you lose the last reference to an object and not when you execute del object.
__de...
What's the best way to join on the same table twice?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
What's the Linq to SQL equivalent to TOP or LIMIT/OFFSET?
... that Foo is a column in MyTable that gets mapped to a property name.
See http://blogs.msdn.com/vbteam/archive/2008/01/08/converting-sql-to-linq-part-7-union-top-subqueries-bill-horst.aspx for more detail.
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Type converting slices of interfaces
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Here is the official explanation: https://github.com/golang/go/wiki/InterfaceSlice
var dataSlice []int = foo()
var interfaceSlice []interface{} = make([]interface{}, len(dataSlice))
for i, d := range dataSlice {
interfaceSlice[i] = d
}
...
What is the difference between require() and library()?
...parameter of install.packages(), such as
install.packages(package, repos="http://cran.us.r-project.org")
You can wrap require() and library() in suppressPackageStartupMessages() to, well, suppress package startup messages, and also use the parameters require(..., quietly=T, warn.conflicts=F) if ne...
Is there a way to instantiate objects from a string holding their class name?
...
boost::functional has a factory template which is quite flexible: http://www.boost.org/doc/libs/1_54_0/libs/functional/factory/doc/html/index.html
My preference though is to generate wrapper classes which hide the mapping and object creation mechanism. The common scenario I encounter is th...
What are the differences between the different saving methods in Hibernate?
...
This link explains in good manner :
http://www.stevideter.com/2008/12/07/saveorupdate-versus-merge-in-hibernate/
We all have those problems that we encounter just infrequently enough that when we see them again, we know we’ve solved this, but can’t remembe...
When do you use varargs in Java?
...llow this link(it helped me a lot in understanding this concept clearly):
http://www.javadb.com/using-varargs-in-java
P.S: Even I was afraid of using varargs when I didn't knw abt it. But now I am used to it.
As it is said: "We cling to the known, afraid of the unknown", so just use it as much as ...
Override Java System.currentTimeMillis for testing time sensitive code
...me gets back to normal after a number of calls - here is the issue report: http://code.google.com/p/jmockit/issues/detail?id=43
To overcome this we have to turn on one specific HotSpot optimization - run JVM with this argument -XX:-Inline.
While this may not be perfect for production, it is just f...
Remove spaces from std::string in C++
...
Can you use Boost String Algo? http://www.boost.org/doc/libs/1_35_0/doc/html/string_algo/usage.html#id1290573
erase_all(str, " ");
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