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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...
Maximum filename length in NTFS (Windows XP and Windows Vista)?
...TH value (259 characters for files, 248 for folders). See http://msdn.microsoft.com/en-us/library/aa365247.aspx for full details.
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How can I get the console logs from the iOS Simulator?
I want to see what happens in the iOS Simulator if I'm not testing the app in Xcode.
12 Answers
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Invalid default value for 'create_date' timestamp field
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Using OS X, install mysql from Homebrew, System Variables based on its compiled-in defaults.
Solution is to remove "NO_ZERO_DATE" from System Variables "sql_mode".
Just please keep in mind that scope involve.
If you want to affe...
Programmatically get own phone number in iOS
...r using it. Here's the response from Apple:
"For security reasons, iPhone OS restricts an application (including its preferences and data) to a unique location in the file system. This restriction is part of the security feature known as the application's "sandbox." The sandbox is a set of fine-gra...
Remote debugging Tomcat with Eclipse
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This is for those in Windows OS: set JPDA_OPTS=-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n catalina.bat jpda start
– Lee Chee Kiam
Sep 26 '13 at 9:44
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How to use regex with find command?
...e `findutils-default', `awk', `egrep', `ed', `emacs', `gnu-awk', `grep', `posix-awk', `posix-basic', `posix-egrep', `posix-extended', `posix-minimal-basic', `sed'.
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How do I get Windows to go as fast as Linux for compiling C++?
... the same operations (including the dir) on the same filesystem. I came across this which benchmarks a few filesystems for various parameters.
Caching. I once tried to run a compilation on Linux on a RAM disk and found that it was slower than running it on disk thanks to the way the kernel takes car...
How to keep a Python script output window open?
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When the program ends, it'll drop you back to the cmd prompt instead of closing the window.
Add code to wait at the end of your script. For Python2, adding ...
raw_input()
... at the end of the script makes it wait for the Enter key. That method is annoying because you have to modify the script,...
Why are elementwise additions much faster in separate loops than in a combined loop?
Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop.
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