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java.sql.SQLException: - ORA-01000: maximum open cursors exceeded
...the maximum-open-cursors error, is an extremely common error in Oracle database development. In the context of Java, it happens when the application attempts to open more ResultSets than there are configured cursors on a database instance.
Common causes are:
Configuration mistake
You have more ...
How to reload a clojure file in REPL
...nificantly. It provides an easy refresh function that does smart reloading based on a dependency graph of the namespaces.
myapp.web=> (require '[clojure.tools.namespace.repl :refer [refresh]])
nil
myapp.web=> (refresh)
:reloading (myapp.web)
:ok
Unfortunately reloading a second time will fa...
Why an abstract class implementing an interface can miss the declaration/implementation of one of th
...et of interface methods it makes better sense to factor it into a separate base class (DRY trumps one-place-code)
– Gishu
Oct 13 '08 at 15:23
4
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What are the best practices for catching and re-throwing exceptions?
..., $host);
}
catch (Exception $e) {
echo "Error while connecting to database!";
die;
}
Logging or partial cleanup
Sometimes you do not know how to properly handle an exception inside a specific context; perhaps you lack information about the "big picture", but you do want to log the failur...
Remove columns from DataTable in C#
...below code should work. It will remove at index 10 (remember Columns are 0 based), until the Column count is 10 or less.
DataTable dt;
int desiredSize = 10;
while (dt.Columns.Count > desiredSize)
{
dt.Columns.RemoveAt(desiredSize);
}
...
How to clear MemoryCache?
...
SignaledChangeMonitor.Signaled += OnSignalRaised;
base.InitializationComplete();
}
public static void Signal(string name = null)
{
if (Signaled != null)
{
// Raise shared event to notify all subscribers
...
Drop multiple tables in one shot in mysql
How to drop multiple tables from one single database at one command.
something like,
4 Answers
...
Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
...access to items (which is not usually required, as ordering is done in database).
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Is there a simple, elegant way to define singletons? [duplicate]
...he Metaclass approach.
class Singleton(type):
def __init__(cls, name, bases, dict):
super(Singleton, cls).__init__(name, bases, dict)
cls.instance = None
def __call__(cls,*args,**kw):
if cls.instance is None:
cls.instance = super(Singleton, cls).__call_...
How to test if a string is basically an integer in quotes using Ruby
...ll do it the right way. That said, my solution above doesn't deal with non-base-10 integers. So here's the way to do with without resorting to exceptions:
class String
def integer?
[ # In descending order of likeliness:
/^[-+]?[1-9]([0-9]*)?$/, # decima...