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How can I add to List
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Sorry, but you can't.
The wildcard declaration of List<? extends Number> foo3 means that the variable foo3 can hold any value from a family of types (rather than any value of a specific type). It means that any of these are legal assignments:
List<? extends Number> foo3 = ...
Convert Year/Month/Day to Day of Year in Python
... answered Mar 8 '09 at 9:27
DzinXDzinX
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Stop all active ajax requests in jQuery
I have a problem, when submitting a form all active ajax request fail, and that triggers error event.
16 Answers
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WPF and initial focus
...er.FocusedElement="{Binding ElementName=SomeElement}">
<DataGrid x:Name="SomeElement">
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</DataGrid>
</Window>
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What is the correct way to make a custom .NET Exception serializable?
More specifically, when the exception contains custom objects which may or may not themselves be serializable.
7 Answers
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How to check for null in Twig?
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Depending on what exactly you need:
is null checks whether the value is null:
{% if var is null %}
{# do something #}
{% endif %}
is defined checks whether the variable is defined:
{% if var is not defined %}
{# do something #}
{% ...
Seeding the random number generator in Javascript
...t, but it's fairly easy to write your own generator, or better yet use an existing one. Check out: this related question.
Also, see David Bau's blog for more information on seeding.
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Hide grid row in WPF
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UpVoted - Converters permit all this to be declarative in Xaml. I generally hate using code-behind to fiddle with visual stuff.
– Allen
May 22 '14 at 13:43
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IEnumerable and Recursion using yield return
...ce
yield return c.GetDeepControlsByType<T>();
with:
foreach (var x in c.GetDeepControlsByType<T>())
{
yield return x;
}
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Generating a PNG with matplotlib when DISPLAY is undefined
I am trying to use networkx with Python. When I run this program it get this error. Is there anything missing?
12 Answers
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