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How to install therubyracer gem on 10.10 Yosemite?

... It's also worth mentioning that if you're using a Gemfile and still having trouble installing therubyracer, it's probably because there's a different version of libv8 that's already been added to the Gemfile.lock. Just add gem 'libv8', '3.16.14.3' (or whatever is the exact version o...
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Create directories using make file

I'm a very new to makefiles and i want to create directories using makefile. My project directory is like this 9 Answers ...
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How to access environment variable values?

... print(os.environ.get('KEY_THAT_MIGHT_EXIST')) # os.getenv is equivalent, and can also give a default value instead of `None` print(os.getenv('KEY_THAT_MIGHT_EXIST', default_value)) Python default installation on Windows is C:\Python. If you want to find out while running python you can do: impo...
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Deleting folders in python recursively

... Try rmtree() in shutil from the Python standard library share | improve this answer | follow | ...
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Play a Sound with Python [duplicate]

...nd file (.wav) in Python? By easiest I mean both most platform independent and requiring the least dependencies. pygame is certainly an option, but it seems overkill for just sound. ...
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How to remove all callbacks from a Handler?

I have a Handler from my sub-Activity that was called by the main Activity . This Handler is used by sub-classes to postDelay some Runnables, and I can't manage them. Now, in the onStop event, I need to remove them before finishing the Activity (somehow I called finish() , but it still call ...
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Ubuntu rails install fails on zlib

...0 as my dev box; it's my first serious foray into Linux as a daily-use OS, and I'm having a hard time getting Rails going. I have followed a number of tutorials which all seem to work fine, but when I try and use gem install or gem update on anything, I get an error that looks like this: ...
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How to set the current working directory? [duplicate]

... I usually use os.getcwd() first, and that shows me the format of the accepted input for os.chdir(). – Rani Kheir Apr 21 '16 at 9:22 a...
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How would I get a cron job to run every 30 minutes?

...to add a crontab entry to execute a script every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0. ...
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What is “android.R.layout.simple_list_item_1”?

I've started learning Android development and am following a todolist example from a book: 7 Answers ...