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pandas: filter rows of DataFrame with operator chaining
Most operations in pandas can be accomplished with operator chaining ( groupby , aggregate , apply , etc), but the only way I've found to filter rows is via normal bracket indexing
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Priority queue in .Net [closed]
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I like using the OrderedBag and OrderedSet classes in PowerCollections as priority queues.
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How to open a web server port on EC2 instance
...to the "Network & Security" -> Security Group settings in the left hand navigation
Find the Security Group that your instance is apart of
Click on Inbound Rules
Use the drop down and add HTTP (port 80)
Click Apply and enjoy
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Convert int to ASCII and back in Python
I'm working on making a URL shortener for my site, and my current plan (I'm open to suggestions) is to use a node ID to generate the shortened URL. So, in theory, node 26 might be short.com/z , node 1 might be short.com/a , node 52 might be short.com/Z , and node 104 might be short.com/ZZ . When...
Correct way to convert size in bytes to KB, MB, GB in JavaScript
... does not active her copied code anymore
Now, Fixed version unminified, and ES6'ed: (by community)
function formatBytes(bytes, decimals = 2) {
if (bytes === 0) return '0 Bytes';
const k = 1024;
const dm = decimals < 0 ? 0 : decimals;
const sizes = ['Bytes', 'KB', 'MB', 'GB', ...
UIScrollView Scrollable Content Size Ambiguity
...le with AutoLayout in Interface Builder (Xcode 5 / iOS 7).
It's very basic and important so I think everyone should know how this properly works. If this is a bug in Xcode, it is a critical one!
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What is the difference between tree depth and height?
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The difference between them is that in one case you count number of nodes and in other number of edges on the shortest path between root and concrete node.
Which is which?
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What does a tilde do when it precedes an expression?
I saw it in an answer, and I've never seen it before.
5 Answers
5
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C++ Convert string (or char*) to wstring (or wchar_t*)
... string of your interest, then your problem can be fully solved with the standard library (C++11 and newer) alone.
The TL;DR version:
#include <locale>
#include <codecvt>
#include <string>
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
std::string ...
Resize image proportionally with MaxHeight and MaxWidth constraints
...wing scenarios:
Is the image smaller than the bounding box?
Is the Image and the Bounding Box square?
Is the Image square and the bounding box isn't
Is the image wider and taller than the bounding box
Is the image wider than the bounding box
Is the image taller than the bounding box
private Image...