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PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
...context I recommend to use one db with multiple schemas, as you can (e.g.) UNION ALL across schemas, but not across databases. For that reason, a database is really completely insulated from another database while schemas are not insulated from other schemas within the same database.
If you -for so...
Linq to Entities - SQL “IN” clause
... be used interchangeably depending on your preference:
Query Syntax:
var selected = from u in users
where new[] { "Admin", "User", "Limited" }.Contains(u.User_Rights)
select u
foreach(user u in selected)
{
//Do your stuff on each selected user;
}
Method Syntax:...
How can I use an array of function pointers?
...ived class.
Often you see something like this
struct function_table {
char *name;
void (*some_fun)(int arg1, double arg2);
};
void function1(int arg1, double arg2)....
struct function_table my_table [] = {
{"function1", function1},
...
So you can reach into the table by name and ca...
Can we make unsigned byte in Java
... for the `unsignedByte` variable,
* i.e. `short`, `int`, `long` and even `char`, but during bitwise operations
* it would get casted to `int` anyway.
*/
void printUnsignedByte(byte b) {
int unsignedByte = b & 0xFF;
System.out.println(unsignedByte); // "200"
}
...
Installing Java 7 on Ubuntu
...ther JDK versions installed
sudo update-alternatives --config java
then select the Java 7 version.
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Can a unit test project load the target application's app.config file?
...08 I added the app.config file to the test project as an existing item and selected copy as link in order to make sure it's not duplicated. That way I only have one copy in my solution. With several test projects it comes in really handy!
...
What is the maximum length of a Push Notification alert text?
...me experiments.
Alerts: Prior to iOS 7, the alerts display limit was 107 characters. Bigger messages were truncated and you would get a "..." at the end of the displayed message. With iOS 7 the limit seems to be increased to 235 characters. If you go over 8 lines your message will also get truncat...
Best way to work with dates in Android SQLite [closed]
...ing (that is newest date goes first):
public static final String QUERY = "SELECT table._id, table.dateCol FROM table ORDER BY table.dateCol DESC";
//...
Cursor cursor = rawQuery(QUERY, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
// Process results
}
Al...
Equivalent C++ to Python generator pattern
...rs. For example, reading from std::cin is similar to having a generator of char.
You simply need to understand what a generator does:
there is a blob of data: the local variables define a state
there is an init method
there is a "next" method
there is a way to signal termination
In your trivial...
If table exists drop table then create it, if it does not exist just create it
...up the old table,
obviously.
Wrapping all statements with something like SELECT GET_LOCK('__upgrade', -1); ... DO RELEASE_LOCK('__upgrade'); allows to just invoke all statements sequentially without error checking, but I don't think it's a good idea: complexity increases and locking functions in M...