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Overload constructor for Scala's Case Classes?
...f apply(bar: Int) = new Foo(bar)
}
Foo(1, 2)
Foo(1)
In Scala 2.8, named and default parameters can often be used instead of overloading.
case class Baz(bar: Int, baz: Int = 0)
new Baz(1)
Baz(1)
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How to retrieve a user environment variable in CMake (Windows)
...Name="Hello World" cmake ..
env [--unset=NAME]... [NAME=VALUE]... COMMAND [ARG]...
Run command in a modified environment.
Just be aware that this may only work the first time. If CMake re-configures with one of the consecutive builds (you just call e.g. make, one CMakeLists.txt was cha...
What is the equivalent of “colspan” in an Android TableLayout?
I'm using a TableLayout in Android. Right now I have one TableRow with two items in it, and, below that, a TableRow with one item it it. It renders like this:
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Set value to null in WPF binding
...le:
<TextBox Text="{Binding Price, TargetNullValue=''}"/>
Which stands for (thanks Gregor for your comment):
<TextBox Text="{Binding Price, TargetNullValue={x:Static sys:String.Empty}}"/>
sys is the imported xml namespace for System in mscorlib:
xmlns:sys="clr-namespace:System;ass...
Convert string to binary in python
...rent version 3.7.4): (1) bytearray expects an encoding (not just a string) and (2) map(bin, ...) will return the map object. For the first point, I use for instance bob.encoding('ascii')` as suggested by @Tao. For the second, point, using the join method, as in the other examples of @Kasramvd will ...
Inverse dictionary lookup in Python
... .index only needs to guarantee that it returns a single value and it does not need to be lexically first only that it be the first match and that it's behavior is stable (multiple calls on same dict over time should yield same matching element). Unless dictionaries rearrange their unmo...
Heroku + node.js error (Web process failed to bind to $PORT within 60 seconds of launch)
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important that you use process.env.PORT and not process.env.port.
– gprasant
Feb 25 '14 at 14:15
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How to set Meld as git mergetool
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CenterOrbit mentions in the comments for Mac OS to install homebrew, and then:
brew cask install meld
git config --global merge.tool meld
git config --global diff.guitool meld
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What's the difference between a word and byte?
I've done some research.
A byte is 8 bits and a word is the smallest unit that can be addressed on memory. The exact length of a word varies. What I don't understand is what's the point of having a byte? Why not say 8 bits?
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Does disposing streamreader close the stream?
I am sending a stream to methods to write on, and in those methods I am using a binary reader/wrtier. When the reader/writer gets disposed, either by using or just when it is not referenced, is the stream closed as well??
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