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How to read a large file - line by line?
I want to iterate over each line of an entire file. One way to do this is by reading the entire file, saving it to a list, then going over the line of interest. This method uses a lot of memory, so I am looking for an alternative.
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Convert JavaScript String to be all lower case?
...ying toLowerCase or toLocaleLowerCase on null would yield null (and not an error condition).
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Regular Expression to match only alphabetic characters
I was wondering If I could get a regular expression which will match a string that only has alphabetic characters, and that alone.
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Split an NSString to access one particular piece
...ond "S" should not be "lower case" (substringWithRange) or you will get an error like "this method doesn't exist".
– Marcos Reboucas
Apr 13 '15 at 12:51
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How do I tell CPAN to install all dependencies?
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If you get an error Can't locate object method "install" via package "xxx" at -e line 1. add a "+" right before the module name.
– Yann Sagon
Mar 28 '14 at 16:12
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How to reverse a 'rails generate'
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rails destroy controller Controller_name was returning a bunch of errors. To be able to destroy controller I had to remove related routes in routes.rb. P.S. I'm using rails 3.1
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How to print from GitHub
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answered May 12 '16 at 2:05
kitsunekitsune
12422 silver badges66 bronze badges
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Python executable not finding libpython shared library
...tOS 7 minimal. It all worked fine on its own, but I saw the shared library error mentioned in this question when I tried running a simple CGI script:
tail /var/log/httpd/error_log
AH01215: /opt/rh/rh-python35/root/usr/bin/python: error while loading shared libraries: libpython3.5m.so.rh-python35-1....
Using Emacs as an IDE
...n just M-x compile and use the default. Emacs will capture C/C++ compiler errors (works best with GCC) and help you navigate to lines with warnings or errors.
Debugging - similarly, when you want to debug, type M-x gdb and it will create a gdb buffer with special bindings
Documentation Lookup - ema...
How to obtain the number of CPUs/cores in Linux from the command line?
I have this script, but I do not know how to get the last element in the printout:
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