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How to copy data from one table to another new table in MySQL?
...
This will do what you want:
INSERT INTO table2 (st_id,uid,changed,status,assign_status)
SELECT st_id,from_uid,now(),'Pending','Assigned'
FROM table1
If you want to include all rows from table1. Otherwise you can add a WHERE statement to the end if you want to add only a sub...
How do I iterate through the files in a directory in Java?
...st if the given file (path) is a directory. If this is true, then you just call the same method again with its File#listFiles() outcome. This is called recursion.
Here's a basic kickoff example.
public static void main(String... args) {
File[] files = new File("C:/").listFiles();
showFiles...
ExecutorService, how to wait for all tasks to finish
... In your parlance, you'll need to modify or wrap ComputeDTask to implement Callable<>, which can give you quite a bit more flexibility. Probably in your app there is a meaningful implementation of Callable.call(), but here's a way to wrap it if not using Executors.callable().
ExecutorService...
Object-orientation in C
...struct base *b2_ptr = (struct base *)&d2;
base_dance(b1_ptr); /* calls derived1_dance */
base_dance(b2_ptr); /* calls derived2_dance */
base_jump(b1_ptr, 42); /* calls derived1_jump */
base_jump(b2_ptr, 42); /* calls derived2_jump */
return 0;
}
And that's how you do...
When is it right for a constructor to throw an exception?
...onstructor's job is to bring the object into a usable state. There are basically two schools of thought on this.
One group favors two-stage construction. The constructor merely brings the object into a sleeper state in which it refuses to do any work. There's an additional function that does the ac...
Why is @autoreleasepool still needed with ARC?
...utoreleases, it just adds in the required ones for you. So there are still calls to retain, there are still calls to release, there are still calls to autorelease and there are still auto release pools.
One of the other changes they made with the new Clang 3.0 compiler and ARC is that they replaced...
Efficient string concatenation in C++
...ould eliminate some return value copies. That is because in a successively called operator+ it does not know whether the reference parameter references a named object or a temporary returned from a sub operator+ invocation. I would rather not worry about it before not having profiled first. But let'...
C++ - passing references to std::shared_ptr or boost::shared_ptr
...?
It all depends what is in those '...' sections of the code. What if you call something during the first '...' that has the side-effect (somewhere in another part of the code) of clearing a shared_ptr to that same object? And what if it happens to be the only remaining distinct shared_ptr to that ...
Is using a lot of static methods a bad thing?
...ve the same output for the same inputs. It modifies no globals and doesn't call any "unsafe" static methods of any class. Essentially, you are using a limited sort of functional programming -- don't be afraid of these, they're fine.
An "unsafe" static method mutates global state, or proxies to a glo...
Class does not implement its superclass's required members
...coder: NSCoder) {
self.init(stringParam: "", intParam: 5)
}
Note the call to an initializer in self. This allows you to only have to use dummy values for the parameters, as opposed to all non-optional properties, while avoiding throwing a fatal error.
The third option of course is to implem...