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Python Pandas: Get index of rows which column matches certain value
...] returns the ith row of df. i does not refer to the index label, i is a 0-based index.
In contrast, the attribute index returns actual index labels, not numeric row-indices:
df.index[df['BoolCol'] == True].tolist()
or equivalently,
df.index[df['BoolCol']].tolist()
You can see the difference ...
What does the X-SourceFiles header do?
...rstood by certain debugging modules in IIS / IIS Express. It contains the base64-encoded path to the source file on disk and is used to link a page's generated output back to that source file. It's only generated for localhost requests, so you don't need to worry about it being displayed to the wo...
How to recursively list all the files in a directory in C#?
...
Note that in .NET 4.0 there are (supposedly) iterator-based (rather than array-based) file functions built in:
foreach (string file in Directory.EnumerateFiles(path, "*.*", SearchOption.AllDirectories))
{
Console.WriteLine(file);
}
At the moment I'd use something like bel...
Calling static generic methods
...
Yes, this is type inference based on the target of the assignment, as per JLS section 15.12.2.8. To be explicit, you'd call something like:
Foo.<String>createFoo();
shar...
NumPy or Pandas: Keeping array type as integer while having a NaN value
...un into issues that join columns are converted into either ints or floats, based on the existence of a NA value in the original list. (Creating issues later on when trying to merge these dataframes)
– Carst
Jul 23 '13 at 21:36
...
How to call shell commands from Ruby
...
This explanation is based on a commented Ruby script from a friend of mine. If you want to improve the script, feel free to update it at the link.
First, note that when Ruby calls out to a shell, it typically calls /bin/sh, not Bash. Some Bash ...
How can I find out the current route in Rails?
...
Based on @AmNaN suggestion (more details):
class ApplicationController < ActionController::Base
def current_controller?(names)
names.include?(params[:controller]) unless params[:controller].blank? || false
end
help...
“message failed to fetch from registry” while trying to install any module
...ining a recent version of Node or installing on older Ubuntu and other apt-based distributions may require a few extra steps. Example install:
sudo apt-get update
sudo apt-get install -y python-software-properties python g++ make
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
su...
Javascript Equivalent to C# LINQ Select
...r my where() + firstOrDefault(). These could also be used with the string based function constructor approach (which is the fastest), but here is another approach using an object literal as filter:
Array.prototype.where = function (filter) {
var collection = this;
switch(typeof filter) {...
Android: How to create a Dialog without a title?
... Well, according to the official documentation, "A dialog made with the base Dialog class must have a title. If you don't call setTitle(), then the space used for the title remains empty, but still visible. If you don't want a title at all, then you should create your custom dialog using the Aler...