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Access parent DataContext from DataTemplate
I have a ListBox which binds to a child collection on a ViewModel. The listbox items are styled in a datatemplate based on a property on the parent ViewModel:
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Fastest hash for non-cryptographic uses?
...to store a short hash of them instead (I will be simply comparing if they exist or not, so hash is ideal).
13 Answers
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How to get the mouse position without events (without moving the mouse)?
...with a div that covers the whole document. Inside that, create (say) 2,000 x 2,000 <a> elements (so that the :hover pseudo-class will work in IE 6, see), each 1 pixel in size. Create a CSS :hover rule for those <a> elements that changes a property (let's say font-family). In your load ha...
Sum a list of numbers in Python
...ent 1 + element 2) / 2, ... etc.
We make two lists: one of every element except the first, and one of every element except the last. Then the averages we want are the averages of each pair taken from the two lists. We use zip to take pairs from two lists.
I assume you want to see decimals in the r...
In Functional Programming, what is a functor?
...ready understands the term. Looking around on the web has provided either excessively technical descriptions (see the Wikipedia article ) or incredibly vague descriptions (see the section on Functors at this ocaml-tutorial website ).
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Ignore python multiple return value
...uple you wish to ignore. For instance:
def f():
return 1, 2, 3
_, _, x = f()
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Type of conditional expression cannot be determined because there is no implicit conversion between
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The spec (§7.14) says that for conditional expression b ? x : y, there are three possibilities, either x and y both have a type and certain good conditions are met, only one of x and y has a type and certain good conditions are met, or a compile-time error occurs. Here...
How to leave a message for a github.com user
...f the change or the one who accepted it.
Provided you're really dying to exchange with user user_test
Display the public activity page of the user: https://github.com/user_test?tab=activity
Search for an event stating "user_test pushed to [branch] at [repository]". There are usually good chances,...
How to convert a boolean array to an int array
...d to int in many cases, so you can add it to int arrays without having to explicitly convert it:
>>> x
array([ True, False, True], dtype=bool)
>>> x + [1, 2, 3]
array([2, 2, 4])
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How to make a great R reproducible example
...or guidance on mailing lists and here on Stack Overflow, a reproducible example is often asked and always helpful.
23 An...