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What are Scala context and view bounds?
...dy, but, if so, the question isn't apparent in the "related" bar. So, here it is:
What is a View Bound?
A view bound was a mechanism introduced in Scala to enable the use of some type A as if it were some type B. The typical syntax is this:
def f[A <% B](a: A) = a.bMethod
In other words, A s...
How do you change Background for a Button MouseOver in WPF?
I have a button on my page with this XAML:
6 Answers
6
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Inherit from a generic base class, apply a constraint, and implement an interface in C#
This is a syntax question. I have a generic class which is inheriting from a generic base class and is applying a constraint to one of the type parameters. I also want the derived class to implement an interface. For the life of me, I cannot seem to figure out the correct syntax.
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How do I get an apk file from an Android device?
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Use adb. With adb pull you can copy files from your device to your system, when the device is attached with USB.
Of course you also need the right permissions to access the directory your file is in. If not, you will need to root th...
How do you check if a selector matches something in jQuery? [duplicate]
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As the other commenters are suggesting the most efficient way to do it seems to be:
if ($(selector).length ) {
// Do something
}
If you absolutely must have an exists() function - which will be slower- you can do:
jQuery.fn.exists = function(){return this.length>0;}
Then in your...
How to remove all leading zeroes in a string
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why overcomplicate things? and mike it's $str += 0; as explained here: nabtron.com/kiss-code
– Nabeel Khan
Apr 16 '16 at 23:58
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Adding Only Untracked Files
One of the commands I find incredibly useful in Git is git add -u to throw everything but untracked files into the index. Is there an inverse of that? In the last few months, I've often found myself in a position where I've interactively added some updates to the index and I want to add all of the...
What's the false operator in C# good for?
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You can use it to override the && and || operators.
The && and || operators can't be overridden, but if you override |, &, true and false in exactly the right way the compiler will call | and & when you write || ...
Can pandas automatically recognize dates?
Today I was positively surprised by the fact that while reading data from a data file (for example) pandas is able to recognize types of values:
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Recent file history in Vim?
...em.
(Probably only useful for '0 to get back to the last file you were editing, unless your memory is stronger than mine.)
You can also use the :browse oldfiles command to get a menu with numbers.
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