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How to empty a Heroku database

... Thank you. Actually, "heroku pg:reset --db SHARED_DATABASE_URL" did the trick. But you got me going in the right direction. – Jay Godse Mar 17 '11 at 22:17 ...
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How to elegantly rename all keys in a hash in Ruby? [duplicate]

...to do ages = Hash[ages.map {|k, v| [mappings[k] || k, v] }] to be able to call the variable again with the mapping. – Chanpory Nov 9 '10 at 20:32 ...
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Clear terminal in Python [duplicate]

... Note that this is not portable across all terminal types... not that you'll run into too many odd types these days... – Ignacio Vazquez-Abrams Jan 18 '10 at 7:44 ...
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Where does git config --global get written to?

...Vascellaro points out in the comments, it will work with non-standard install locations. (i.e. Git Portable) (like the latest PortableGit-2.14.2-64-bit.7z.exe, which can be uncompressed anywhere you want) Original answer (2010) From the docs: --global For writing options: write to global ~/.gitc...
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Run batch file as a Windows service

... NSSM is totally free and hyper-easy, running command prompt / terminal as administrator: nssm install "YourCoolServiceNameLabel" then a dialog will appear so you can choose where is the file you want to run. to uninstall nssm remov...
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Running unittest with typical test directory structure

...on -m unittest test.test_antigravity.GravityTestCase.test_method Running all tests: You can also use test discovery which will discover and run all the tests for you, they must be modules or packages named test*.py (can be changed with the -p, --pattern flag): $ cd new_project $ python -m unitte...
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How many characters can UTF-8 encode?

... UTF-8 does not use one byte all the time, it's 1 to 4 bytes. The first 128 characters (US-ASCII) need one byte. The next 1,920 characters need two bytes to encode. This covers the remainder of almost all Latin alphabets, and also Greek, Cyrilli...
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Android Facebook style slide

...ough the transparent View. The code is here, and the bottom two buttons (called HorzScrollWithListMenu and HorzScrollWithImageMenu) in the Launch activity show the best menus I could come up with: Android sliding menu demo Screenshot from emulator (mid-scroll): Screenshot from device (full-scr...
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HTML img tag: title attribute vs. alt attribute?

... I'd go for both. Title will show a nice tooltip in all browsers and alt will give a description when browsing in a browser with no images. That said, I'd love to see some stats of how many "surfers" out there going to a "store" to browse merchandise actually have images turn...
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Need a simple explanation of the inject method

...otal and then stores the result back into the accumulator. The next block call has this new value, adds to it, stores it again, and repeats. At the end of the process, inject returns the accumulator, which in this case is the sum of all the values in the array, or 10. Here's another simple example...