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Label encoding across multiple columns in scikit-learn
...For inverse_transform and transform, you have to do a little bit of hack.
from collections import defaultdict
d = defaultdict(LabelEncoder)
With this, you now retain all columns LabelEncoder as dictionary.
# Encoding the variable
fit = df.apply(lambda x: d[x.name].fit_transform(x))
# Inverse th...
StringBuilder vs String concatenation in toString() in Java
...erties it might not make a
difference, but at what point do you
switch from concat to builder?
At the point where you're concatenating in a loop - that's usually when the compiler can't substitute StringBuilder by itself.
...
How can I determine the URL that a local Git repository was originally cloned from?
I pulled a project from GitHub a few days ago. I've since discovered that there are several forks on GitHub, and I neglected to note which one I took originally. How can I determine which of those forks I pulled?
...
How to Sync iPhone Core Data with web server, and then push to other devices? [closed]
...y Chris. For an in-depth, theoretical discussion of syncing, see the paper from Russ Cox (MIT) and William Josephson (Princeton):
File Synchronization with Vector Time Pairs
which applies equally well to core data with some obvious modifications. This provides an overall much more robust and relia...
The OutputPath property is not set for this project
When I try to compile my project from x86 debug mode in Visual Studio 2008. I am getting this error. When I looked at the property group of the project that complained, I see output path is set.
...
Logout: GET or POST?
...ures, a logout that then asks me if I'm sure. Guess it keeps the prefetch from logging you out, but Amazon, Ebay, and Gmail all use GET for logout without that trick page in between what the user is told is logout and the actual logout event. I would imagine that in between page would lead to a lo...
How do I check if there are duplicates in a flat list?
... Denis Otkidach offered a solution where you just build a new set from the list, then check its length. Its advantage is that it's letting the C code inside Python do the heavy lifting. Your solution loops in Python code, but has the advantage of short-circuiting when a single match has b...
Jenkins Git Plugin: How to build specific tag?
..., fixed (i.e., non-parameterized) tag. I had to cobble together a solution from the various answers plus the "build a Git tag" blog post cited by Thilo.
Make sure you push your tag to the remote repository with git push --tags
In the "Git Repository" section of your job, under the "Source Code Man...
Omitting all xsi and xsd namespaces when serializing an object in .NET?
...nd of two answers.
If you want to just strip all namespaces arbitrarily from a document during serialization, you can do this by implementing your own XmlWriter.
The easiest way is to derive from XmlTextWriter and override the StartElement method that emits namespaces. The StartElement method ...
Why is std::map implemented as a red-black tree?
...Black trees are used in most collection libraries, including the offerings from Java and Microsoft .NET Framework.
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