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Apply pandas function to column to create multiple new columns?
...me column or series you have to create a dataframe of multiple new columns based on a transformation on the original column/series. The transformation function often returns k-tuples, and these k-tuples must be separated into k columns, based on some order. @Ben's answer clearly does this very neatl...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...y();
echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);
The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_replace to fix that and you should be good to go!
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Print a string as hex bytes?
...II characters. If your input might contain things like emojis or non-Latin based writting systems, you might want to use ":".join("{:04x}".format(ord(c)) for c in s) (replacing 02x with 04x to zero-pad each number to be 4 digits) instead
– Boris
Nov 11 '19 at 2...
C# vs C - Big performance difference
... C++ application may perform more slowly than the corresponding C# or .NET based application. When specifying the project properties on your C++ application, make sure you enable "full optimization" and "favour fast code". If you have a 64 bit machine, you MUST specify to generate x64 as the target ...
Use C++ with Cocoa Instead of Objective-C?
... you want to share code between C++ apps on other platforms and your Cocoa-based application. The first is to write the model layer in C++ and the GUI in Cocoa. This is a common approach used by some very large apps, including Mathematica. Your C++ code can be left unchanged (you do not need "funky"...
Converting Stream to String and back…what are we missing?
...rmatted bytes". You have arbitrary bytes. You need to use something like a base-n (commonly: base-64) encode. This transfers
arbitrary bytes to a formatted string
a formatted string to the original bytes
look at Convert.ToBase64String and Convert. FromBase64String
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How does one make random number between range for arc4random_uniform()?
... the upper bound is not inclusive. The part "arc4random_uniform(20)+10" is based off community edit and votes.
– Sky
Nov 29 '16 at 13:02
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OpenJDK availability for Windows OS [closed]
...ows builds at Red Hat, jdk builds distributed on developers.redhat.com are based on ojdkbuild. For possible follow-up questions about ojdkbuild project please open an issue on github or post to ojdkuild maillist - I'll comment there.
– alexkasko
Sep 12 '18 at 1...
How to detect the current OS from Gradle
...current()
As of mid 2015, Peter Kahn's answer is still valid. Environment-based profile activation is still something done relatively easier in Maven. But keep in mind that org.apache.tools.ant.taskdefs.condition.Os.isFamily is not exclusive in the sense that if it returns true with one particular ...