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Rename specific column(s) in pandas
...ng a dictionary and perform the list-comprehension with it's get operation by setting default value as the old name:
col_dict = {'gdp': 'log(gdp)', 'cap': 'cap_mod'} ## key→old name, value→new name
df.columns = [col_dict.get(x, x) for x in df.columns]
Timings:
%%timeit
df.rename(columns={...
Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
...- for example in unit testing.
However, in a loosely coupled application, by moving all the references to the Composition Root, the dependency graph is severely flattened:
As illustrated by the green color, it's now possible to reuse Library C without dragging along any unwanted dependencies.
H...
What it the significance of the Javascript constructor property?
Trying to bend by head around Javascript's take on OO...and, like many others, running into confusion about the constructor property. In particular, the significance of the constructor property, as I can't seem to make it have any effect. E.g.:
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What is included in JCenter repository in Gradle?
...ter is the place to find and share popular Apache Maven packages
for use by Maven, Gradle, Ivy, SBT, etc. For the most comprehensive
collection of artifacts, point your Maven at:
http://jcenter.bintray.com Want to distribute your own packages
through JCenter? You can link your package by cli...
What is the significance of load factor in HashMap?
...the initial capacity is greater than the maximum number of entries divided by the load factor, no rehash operations will ever occur.
As with all performance optimizations, it is a good idea to avoid optimizing things prematurely (i.e. without hard data on where the bottlenecks are).
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Lambda capture as const reference?
Is it possible to capture by const reference in a lambda expression?
8 Answers
8
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Where can I locate themes for VS2012
...
As mentioned by ElYusubov below, this is more easily done via NuGet.
– David Yates
Jun 14 '13 at 15:11
add a comm...
.Net HttpWebRequest.GetResponse() raises exception when http status code 400 (bad request) is return
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The contents of the stream returned by GetResponseStream() on the response attached to the WebException is just the name of the status code (e.g. "Bad Request") rather than the response actually returned by the server. Is there any way to get this information?
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ruby send method passing multiple parameters
Trying to create objects and call methods dynamically by
2 Answers
2
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How to Rotate a UIImage 90 degrees?
...ageOrientationUp (portrait) that I would like to rotate counter-clockwise by 90 degrees (to landscape). I don't want to use a CGAffineTransform . I want the pixels of the UIImage to actually shift position. I am using a block of code (shown below) originally intended to resize a UIImage to do ...