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Check if a variable is a string in JavaScript
...ing both typeof and instanceof feels like good advice if your code may be called by others'. @MarkAmery's postmessage edge case matters if you're asking "what was I just postmessaged?" - but you'd expect that to be handled at the interface and not allowed to propagate. Elsewhere, it seems correct t...
Getting a random value from a JavaScript array
... @SapphireSun this is correct. Note the Math.floor(Math.random(...)) call, which rounds down.
– ashes999
Jan 19 '14 at 12:43
34
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Setting up two different static directories in node.js Express framework
...You can also set the path that static files will be served to the web from by specifying an additional (first) parameter to use() like so:
app.use("/public", express.static(__dirname + "/public"));
app.use("/public2", express.static(__dirname + "/public2"));
That way you get two different directo...
Using Pylint with Django
...derstands Django.
This Pylint plugin for Django works quite well:
pip install pylint-django
and when running pylint add the following flag to the command:
--load-plugins pylint_django
Detailed blog post here.
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get list from pandas dataframe column
...rame columns are Pandas Series when you pull them out, which you can then call x.tolist() on to turn them into a Python list. Alternatively you cast it with list(x).
import pandas as pd
data_dict = {'one': pd.Series([1, 2, 3], index=['a', 'b', 'c']),
'two': pd.Series([1, 2, 3, 4], inde...
How do I find out what keystore my JVM is using?
...name and location of the persistent keystore file for the keystore managed by keytool. The keystore is by default stored in a file named .keystore in the user's home directory, as determined by the "user.home" system property. Given user name uName, the "user.home" property value defaults to
C:\Use...
Displaying the build date
...ing(0,16);}} > "$(ProjectDir)\BuildTimestamp.cs" - - - --> then can call it with Build.Timestamp
– FabianSilva
Jun 2 '14 at 16:10
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What is the default value for enum variable?
...
I think it's quite dangerous to rely on the order of the values in a enum and to assume that the first is always the default. This would be good practice if you are concerned about protecting the default value.
enum E
{
Foo = 0, Bar, Baz, Quux
}
Otherwise, all i...
pyplot scatter plot marker size
...lt is rcParams['lines.markersize'] ** 2.
This can be taken literally. In order to obtain a marker which is x points large, you need to square that number and give it to the s argument.
So the relationship between the markersize of a line plot and the scatter size argument is the square. In order...
What is a singleton in C#?
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A singleton is a class which only allows one instance of itself to be created - and gives simple, easy access to said instance. The singleton premise is a pattern across software development.
There is a C# implementation "Implementing the Singleton Pattern i...