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Find the most common element in a list
...utions proposed, I'm amazed nobody's proposed what I'd consider an obvious one (for non-hashable but comparable elements) -- [itertools.groupby][1]. itertools offers fast, reusable functionality, and lets you delegate some tricky logic to well-tested standard library components. Consider for examp...
Recommended SQL database design for tags or tagging [closed]
... that's comma separated (sounds crazy but could work). I've even heard someone recommend a sparse matrix, but then how do the tag names grow gracefully?
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What are MVP and MVC and what is the difference?
...through an interface. This is to allow mocking of the View in a unit test. One common attribute of MVP is that there has to be a lot of two-way dispatching. For example, when someone clicks the "Save" button, the event handler delegates to the Presenter's "OnSave" method. Once the save is completed,...
Accessing dict keys like an attribute?
...en by incoming data
Each AttrDict instance actually stores 2 dictionaries, one inherited and another one in __dict__
Causes a memory leak in Python < 2.7.4 / Python3 < 3.2.3
Pylint goes bananas with E1123(unexpected-keyword-arg) and E1103(maybe-no-member)
For the uninitiated it seems like pure...
When splitting an empty string in Python, why does split() return an empty list while split('\n') re
I am using split('\n') to get lines in one string, and found that ''.split() returns an empty list, [] , while ''.split('\n') returns [''] . Is there any specific reason for such a difference?
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How does one remove an image in Docker?
... Remove untagged images: docker rmi $(docker images | grep "^<none>" | awk "{print $3}")
– Barrett Clark
Oct 5 '15 at 16:11
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MySQL, update multiple tables with one query
...the row with the specified id. Some lessons are learned the hard way, this one was learned in the terrifing way.
– nheimann1
Mar 24 '15 at 15:06
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Break a previous commit into multiple commits
...ssarily mean that git rebase expects the result of this edit to be exactly one commit. Indeed, you can undo the commit, or you can add other commits. This can be used to split a commit into two:
Start an interactive rebase with git rebase -i <commit>^, where <commit> is the commit you w...
Intellij IDEA Java classes not auto compiling on save
...does in the background, but it takes Intellij about 3-4 seconds to compile one small change in one single class. Even the "Compile 'StartController.java'" meaning one class only takes 3-4 seconds. Eclipse does this in less than 100 milliseconds. I will test the eclipse mode plugin again and decide w...
How does one reorder columns in a data frame?
How would one change this input (with the sequence: time, in, out, files):
11 Answers
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