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Get model's fields in Django
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_meta is private, but it's relatively stable. There are efforts to formalise it, document it and remove the underscore, which might happen before 1.3 or 1.4. I imagine effort will be made to ensure things are backwards compatible, because lots of people have been using it anyway.
If you're ...
datatrigger on enum to change image
...y">
2 - in the Value property of the DataTrigger, use the {x:Static} form:
<DataTrigger Binding="{Binding Path=LapCounterPingStatus}" Value="{x:Static my:PingStatus.PING_UNKNOWN}">
Notice that the Enum type must be prefixed with the xmlns prefix you defined above.
Edit:
If your Enu...
What is (functional) reactive programming?
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Semantic determinacy is very important for reasoning, both rigorous and informal.
While concurrency adds enormous complexity to imperative programming (due to nondeterministic interleaving), it is effortless in FRP.
So, what is FRP?
You could have invented it yourself.
Start with these ideas:
Dy...
What is the MySQL VARCHAR max size?
...s are NOT able to be stored in memory tables, so there is a significant performance penalty for using them when a VARCHAR would suffice.
– Camden S.
Jan 28 '14 at 1:01
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Storing C++ template function definitions in a .CPP file
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This code is well-formed. You only have to pay attention that the definition of the template is visible at the point of instantiation. To quote the standard, § 14.7.2.4:
The definition of a non-exported function template, a non-exported m...
How to remove all click event handlers using jQuery?
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
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Apply style ONLY on IE
...tional comment in your HTML:
<!--[if IE]>
<style>
.actual-form table {
width: 100%;
}
</style>
<![endif]-->
There are numerous hacks (e.g. the underscore hack) you can use that will allow you to target only IE within your stylesheet, but it gets very messy...
What is the difference between string primitives and String objects in JavaScript?
...ve-y to String object every time you need to call a method. This is also informatively mentioned in the Annotated ES5 spec. with regard to resolving properties (and "methods"¹) of primitive values:
NOTE The object that may be created in step 1 is not accessible outside of the above method. An i...
What does the “Just” syntax mean in Haskell?
...ven to be an effective way to do it.
Maybe as a Functor
The idea of transforming one type to another one such that operations on the old type can also be transformed to work on the new type is the concept behind the Haskell type class called Functor, which Maybe a has a useful instance of.
Functo...
Javascript - Track mouse position
...00 ms, I should get the new value of posX and posY and print it out in the form.
11 Answers
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