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How efficient is locking an unlocked mutex? What is the cost of a mutex?
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123
I have the choice in between either having a bunch of mutexes or a single one for an object...
django urls without a trailing slash do not redirect
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101
check your APPEND_SLASH setting in the settings.py file
more info in the django docs
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Run a callback only if an attribute has changed in Rails
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Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://github....
Turn off Visual Studio Attach security warning when debugging IIS
When using Visual Studio 2008 or 2010, every time you attach to IIS w3wp.exe you get an Attach Security Warning,
11 Answer...
Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP
...sion by setting a global variable which causes the recursion to stop after 100 recursions.
22 Answers
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how to get last insert id after insert query in codeigniter active record
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edited Jun 25 '15 at 8:35
Vad.Gut
49311 gold badge55 silver badges1818 bronze badges
answered...
Is C++ context-free or context-sensitive?
...mmar; unrestricted grammars are Turing-complete. A context-sensitive (Type-1) grammar allows multiple symbols of context on the left hand side of a production, but the same context must appear on the right hand side of the production (hence the name "context-sensitive"). [1] Context-sensitive gramma...
Set Background cell color in PHPExcel
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10 Answers
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