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Error while installing json gem 'mkmf.rb can't find header files for ruby'
...ruby -e 'puts RUBY_VERSION[/\d+\.\d+/]'`-dev
The first link you’ve posted is exactly your case: there is no ruby development environment installed. Development env is needed to compile ruby extensions, which are mostly written in C. Proxy has nothing to do with the problem: everything is down...
How to install the current version of Go in Ubuntu Precise
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sudo apt-get install python-software-properties # 12.04
sudo add-apt-repository ppa:duh/golang
sudo apt-get update
sudo apt-get install golang
To confirm:
go version
which outputs in my case (Ubuntu precise)
go version go1.1.1 linux/amd64
From there just export the settings you're gonna n...
How to check if Location Services are enabled?
I'm developing an app on Android OS. I don't know how to check if Location Services are enabled or not.
22 Answers
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Importing files from different folder
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Note: This answer was intended for a very specific question. For most programmers coming here from a search engine, this is not the answer you are looking for. Typically you would structure your files into packages (see other answers) instead of modifying the search path.
By default, you c...
What are best practices for validating email addresses on iOS 2.0
...at is the cleanest way to validate an email address that a user enters on iOS 2.0?
13 Answers
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How can I put strings in an array, split by new line?
...ful with this solution, as it does not work on all newlines. I've had the most success with David's answer
– Maurice
Aug 29 '12 at 7:31
1
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How do I get the APK of an installed app without root access?
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Accessing /data/app is possible without root permission; the permissions on that directory are rwxrwx--x. Execute permission on a directory means you can access it, however lack of read permission means you cannot obtain a listing of its contents --...
dyld: Library not loaded: @rpath/libswift_stdlib_core.dylib
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This was my resolution as well. I have an existing iOS app project (ObjC) to which I'm adding a Today Extension (new target in the project, extension is a plugin for the main app). I had to go into the app target settings and enable that Build Setting and viola... problem went...
What does “for” attribute do in HTML tag?
...re equivalent. What you're describing is more about the UI provided by the OS's handling of drop-down menus, which is tied to the mouse itself.
– Barmar
Feb 8 '16 at 15:06
3
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move_uploaded_file gives “failed to open stream: Permission denied” error
...rying to configure the upload directory with Apache 2.2 and PHP 5.3 on CentOS.
13 Answers
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