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Why is isNaN(null) == false in JS?
...ber('abcd') == NaN because Number('abcd') is NaN but not equal to NaN. I adore JavaScript.
– nilfalse
Jul 3 '13 at 8:42
...
Select TreeView Node on right click before displaying ContextMenu
...iewItem using the VisualTreeHelper:
private void OnPreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
TreeViewItem treeViewItem = VisualUpwardSearch(e.OriginalSource as DependencyObject);
if (treeViewItem != null)
{
treeViewItem.Focus();
e.Handled = tr...
Is “else if” faster than “switch() case”? [duplicate]
...
Why do you care?
99.99% of the time, you shouldn't care.
These sorts of micro-optimizations are unlikely to affect the performance of your code.
Also, if you NEEDED to care, then you should be doing performance profiling on yo...
How to change MySQL column definition?
...
Do you mean altering the table after it has been created? If so you need to use alter table, in particular:
ALTER TABLE tablename MODIFY COLUMN new-column-definition
e.g.
ALTER TABLE test MODIFY COLUMN locationExpect VARCH...
Cause CMAKE to generate an error
...NING, AUTHOR_WARNING, SEND_ERROR, and FATAL_ERROR. STATUS messages go to stdout. Every other mode of message, including none, goes to stderr.
You want SEND_ERROR if you want to output an error, but continue processing.
You want FATAL_ERROR if you want to exit CMake processing.
Something like:
if(...
jQuery Datepicker onchange event issue
...in the datepicker: It always fires onSelect (even if nothing changed), and doesn't fire any event on the underlying input on change. (If you look in the code of that example, we're listening for changes, but they aren't being raised.) It should probably fire an event on the input when things change ...
Django get the static files URL in view
...
Since this is the top result on Google, I thought I'd add another way to do this. Personally I prefer this one, since it leaves the implementation to the Django framework.
# Original answer said:
# from django.templatetags.static import static
# Improved answer (thanks @Kenial, see below)
from dj...
C: What is the difference between ++i and i++?
...e incrementation block of a for loop? the answer is, you can use any one.. doesn't matter. It will execute your for loop same no. of times.
for(i=0; i<5; i++)
printf("%d ",i);
And
for(i=0; i<5; ++i)
printf("%d ",i);
Both the loops will produce same output. ie 0 1 2 3 4.
It only ma...
How to make a whole 'div' clickable in html and css without JavaScript? [duplicate]
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Updated URL for document Damien is referencing: w3.org/TR/html5-diff/#content-model, then text search "The a element now" to locate on page
– Luke Griffiths
Sep 16 '14 at 17:55
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Why use the yield keyword, when I could just use an ordinary IEnumerable?
...
That's Linq, isn't it? I imagine Linq does something very similar under the covers.
– Robert Harvey
Dec 28 '12 at 16:14
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