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Inject errors into already validated form?
...eory the validator could check the database, but that smells and is race-prone.)
– Weeble
May 19 '10 at 15:53
1
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ggplot2 keep unused levels barplot
...tity") + facet_wrap( ~ plot, scales="free")
Results in this:
The last one is the most informative as space is taken up by the categories there count = 0
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Difference between Iterator and Listiterator?
...there is no usefull way you can add an element "before" or "after" another one.
– Joachim Sauer
Jun 11 '12 at 10:11
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Difference between Select Unique and Select Distinct
...e,
Emp_FName varchar(16),
Emp_LName varchar(16)
)
i.e. Someone's Social Security Number would likely be a unique field in your table, but not necessarily the primary key.
Distinct is used in the Select statement to notify the query that you only want the unique items returned when a...
How to set the maxAllowedContentLength to 500MB while running on IIS7?
...
So it should work fine.
See also Request Limits article. Does IIS return one of these errors when the appropriate section is not configured at all?
See also: Maximum request length exceeded
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warning about too many open figures
...is means that even if you delete your ref to the figure, there is at least one live ref, hence it will never be garbage collected.
Since I'm polling on the collective wisdom here for this answer, @JoeKington mentions in the comments that plt.close(fig) will remove a specific figure instance from th...
Why should I declare a virtual destructor for an abstract class in C++?
...face's destructor (or the compiler-provided default, if you didn't specify one), not the derived class's destructor. Instant memory leak.
For example
class Interface
{
virtual void doSomething() = 0;
};
class Derived : public Interface
{
Derived();
~Derived()
{
// Do some impor...
jQuery equivalent of JavaScript's addEventListener method
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One thing to note is that jQuery event methods do not fire/trap load on embed tags that contain SVG DOM which loads as a separate document in the embed tag. The only way I found to trap a load event on these were to use raw J...
Qt: How do I handle the event of the user pressing the 'X' (close) button?
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Well, I got it. One way is to override the QWidget::closeEvent(QCloseEvent *event) method in your class definition and add your code into that function. Example:
class foo : public QMainWindow
{
Q_OBJECT
private:
void closeEvent(QCl...
How do I add custom field to Python log format string?
...d to add the extra lines on each log message which is easy to forget and prone to errors. Replacing the super() calls is messier than the answer from unutbu.
– pevogam
Apr 21 '16 at 14:12
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