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How to set environment variable for everyone under my linux system?

... As well as /etc/profile which others have mentioned, some Linux systems now use a directory /etc/profile.d/; any .sh files in there will be sourced by /etc/profile. It's slightly neater to keep your custom environment stuff in these file...
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Setting UIButton image results in blue button in iOS 7

...mal states. If you're looking to preserve the system behavior, animations, etc., but want to get rid of the tint color, try [myUIButton setImage: [[UIImage imageNamed: @"myButtonImage"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] forState: UIControlStateNormal]; (with the button type...
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Bundler: Command not found

... $PATH => zsh: /Users/myself/.rbenv/shims:/Users/myself/.rbenv/bin: ... etc but it was expecting it to be installed for myself - not for root. In my case, its rightful installation place is in ~/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/bundler ...
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What is the difference between is_a and instanceof?

...object $x1 instanceof $x2 // returns false even if $x2 is int, undefined, etc. So, is_a() highlights possible bugs while instanceof suppresses them. share | improve this answer | ...
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Best way to find the intersection of multiple sets?

...duce. It can in general be used quite nicely to build lists, sets, strings etc. Worth a look also is github.com/EntilZha/PyFunctional – Andreas Nov 16 '16 at 6:03 ...
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windows service vs scheduled task

...client that will communicate with the service app via TCP/IP, named pipes, etc. From a user's POV, I wonder which is easier to control. Both services and scheduled tasks are pretty much out of reach for most non-technical users, i.e. they won't even realize they exist and can be configured / stoppe...
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scala vs java, performance and memory? [closed]

...asier to express more generic patterns as types (such as Monads, Functors, etc.). This allows you to create types that don't get in your way due to overly strict contracts, as often happens in Java. Strict contracts not based on actual patterns in the code are the reason Inversion of Responsibilit...
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Purpose of Django setting ‘SECRET_KEY’

...ents). Unique tokens for a user session, password reset request, messages, etc. Prevention of cross-site or replay attacks by adding (and then expecting) unique values for the request. Generating a unique salt for hash functions. So, the general answer is: There are many things in a Django app whi...
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How to see query history in SQL Server Management Studio

....] If SQL Server hasn't been restarted (and the plan hasn't been evicted, etc.), you may be able to find the query in the plan cache. SELECT t.[text] FROM sys.dm_exec_cached_plans AS p CROSS APPLY sys.dm_exec_sql_text(p.plan_handle) AS t WHERE t.[text] LIKE N'%something unique about your query%'; ...
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.htaccess not working apache

...able Apache mod_rewrite module a2enmod rewrite add the following code to /etc/apache2/sites-available/default AllowOverride All Restart apache /etc/init.d/apache2 restart share | improve this an...