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How to create default value for function argument in Clojure
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171
A function can have multiple signatures if the signatures differ in arity. You can use that t...
Failed to install Python Cryptography package with PIP and setup.py
...ample:
C:\> \path\to\vcvarsall.bat x86_amd64
C:\> set LIB=C:\OpenSSL-1.0.1f-64bit\lib;%LIB%
C:\> set INCLUDE=C:\OpenSSL-1.0.1f-64bit\include;%INCLUDE%
C:\> pip install cryptography
Building cryptography on Linux
cryptography should build very easily on Linux provided you have a C compil...
R data formats: RData, Rda, Rds etc
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196
Rda is just a short name for RData. You can just save(), load(), attach(), etc. just like you ...
LINQ query on a DataTable
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1294
You can't query against the DataTable's Rows collection, since DataRowCollection doesn't impl...
How to delete selected text in the vi editor
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215
I am using PuTTY and the vi editor. If I select five lines using my mouse and I want to dele...
Concurrent vs serial queues in GCD
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217
A simple example: you have a block that takes a minute to execute. You add it to a queue from t...
How can I get a count of the total number of digits in a number?
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16 Answers
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What's the best way to store Phone number in Django models
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You might actually look into the internationally standardized format E.164, recommended by Twilio for example (who have a service and an API for sending SMS or phone-calls via REST requests).
This is likely to be the most universal way to store phone numbers, in particular if you have internat...