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What are C++ functors and their uses?
I keep hearing a lot about functors in C++. Can someone give me an overview as to what they are and in what cases they would be useful?
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How to embed a video into GitHub README.md?
Is it possible to embed a flash video into README.md on GitHub? It isn't showing up: https://github.com/mattdipasquale/PicSciP
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What is the volatile keyword useful for?
At work today, I came across the volatile keyword in Java. Not being very familiar with it, I found this explanation .
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Unable to resolve “unable to get local issuer certificate” using git on Windows with self-signed cer
I am using Git on Windows. I installed the msysGit package. My test repository has a self signed certificate at the server. I can access and use the repository using HTTP without problems. Moving to HTTPS gives the error:
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What is the maximum length of latitude and longitude? [closed]
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If latitude coordinate is reported as -6.3572375290155 or -63.572375290155 in decimal degrees then you could round-off and store up to 6 decimal places for 10 cm (or 0.1 meter) precision.
Overview
The valid range of latitude in degrees is -90...
reformat in vim for a nice column layout
I have this dataset in a csv file
13 Answers
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What is the !! (not not) operator in JavaScript?
I saw some code that seems to use an operator I don't recognize, in the form of two exclamation points, like so: !! . Can someone please tell me what this operator does?
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Programmatically creating Markdown tables in R with KnitR
I am just starting to learn about KnitR and the use of Markdown in generating R documents and reports. This looks to be perfect for a lot of the day to day reporting that I have to do with my job. However, one thing that I'm not seeing is an easy way to print data frames and tables using Markdown fo...
setting an environment variable in virtualenv
...at direnv is probably the better option and implies autoenv is no longer maintained.
Old answer
I wrote autoenv to do exactly this:
https://github.com/kennethreitz/autoenv
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Parsing a string into a boolean value in PHP
Today I was playing with PHP, and I discovered that the string values "true" and "false" are not correctly parsed to boolean in a condition, for example considering the following function:
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