kind (114)


Explicit vs implicit SQL joins

Explicit vs implicit SQL joins

Is there any efficiency difference in an explicit vs implicit inner join? For example: SELECT*FROM table a INNER JOIN table b ON a.id=b.id; vs. SELECT a.*, b.* FROM table a, table b WHERE a.id=…


c++ - How can I catch all types of exceptions in one catch block?

In C++, I'm trying to catch all types of exceptions in one catch(like catch(Exception) in C#). How is it done? And what's more, how can one catch divide-by-zero exceptions?…


What's the difference between a “script” and an “application”?

I'm referring to distinctions such as in this answer:...bash isn't for writing applications it's for, well, scripting. So sure, your application might have some housekeeping scripts but don't go wr…


python - Delete all data for a kind in Google App Engine

I would like to wipe out all data for a specific kind in Google App Engine. What is the best way to do this? I wrote a delete script(hack), but since there is so much data is timeout's out after a fe…


Is programming a subset of math?

I've heard many times that all programming is really a subset of math. Some suggest that OO, at its roots, is mathematically based, but I don't get the connection, aside from some obvious examples: u…


Is mathematics necessary for programming?

I happened to debate with a friend during college days whether advanced mathematics is necessary for any veteran programmer. He used to argue fiercely against that. He said that programmers need only…


How to convert DateTime from JSON to C#?

Possible Duplicate: How to convert UNIX timestamp to DateTime and vice versa? I've got the following class:[DataContractAttribute] public class TestClass{[DataMemberAttribute] public DateTi…



How useful is the-[NSObject isMemberOfClass:] method?

Here's a small test program I wrote:#import<Foundation/Foundation.h> int main(int argc, char**argv){NSAutoreleasePool*pool=[[NSAutoreleasePool alloc] init]; NSArray*arr=[NSArra…


Where can I find the default icons used for folders and applications?

I'm trying to load the default HICON that explorer displays for: An open folder An exe that has no embedded default icon of its own. This can also be seen in 'Add/Remove Programs' or 'Programs and…


objective c - In Objective-C, what is the equivalent of Java's “instanceof” keyword?

I would like to check whether an object(e.g. someObject) is assignable(cast-able) to a variable of another type(e.g. SpecifiedType). In Java, I can write: someObject instanceof SpecifiedType A rel…




what type the how for not and class swift error