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Android: Generate random color on click?
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Random rnd = new Random();
paint.setARGB(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
or
Random rnd = new Random();
int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
view.setBackgroundColor(color);
Though in your case i...
Replacing Pandas or Numpy Nan with a None to use with MysqlDB
...null(df), None)
Note: this changes the dtype of all columns to object.
Example:
In [1]: df = pd.DataFrame([1, np.nan])
In [2]: df
Out[2]:
0
0 1
1 NaN
In [3]: df1 = df.where(pd.notnull(df), None)
In [4]: df1
Out[4]:
0
0 1
1 None
Note: what you cannot do recast the DataFr...
How can I get nth element from a list?
How can I access a list by index in Haskell, analog to this C code?
6 Answers
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How to get the primary IP address of the local machine on Linux and OS X? [closed]
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private final static attribute vs private final attribute
...s of the type, and any code referring to the variable is referring to the exact same data. Compare this with an instance variable: in that case, there's one independent version of the variable per instance of the class. So for example:
Test x = new Test();
Test y = new Test();
x.instanceVariable = ...
How to check that a string is a palindrome using regular expressions?
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How do I remove  from the beginning of a file?
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That's exactly the issue, different character encodings use different bytes for the same characters. Read again the third paragraph of the answer.
– Vinko Vrsalovic
Oct 7 '17 at 17:18
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How do I get an animated gif to work in WPF?
...ith weird artifacts.
Best solution I have found so far:
https://github.com/XamlAnimatedGif/WpfAnimatedGif
You can install it with NuGet
PM> Install-Package WpfAnimatedGif
and to use it, at a new namespace to the Window where you want to add the gif image and use it as below
<Window x:Class...
Why does Python code use len() function instead of a length method?
...a protocol, they can provide alternative ways of implementing things. For example, you can create an iterable with __iter__, or with only __getitem__, and iter(x) will work either way. You can create a usable-in-bool-context object with __bool__ or __len__, and bool(x) will work either way. And so o...
How to compile and run C/C++ in a Unix console/Mac terminal?
How can I compile/run C or C++ in Unix console or a Mac terminal?
16 Answers
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