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Coding Katas for practicing the refactoring of legacy code
...n is this:
Find an old, small, unmaintained open source project on sourceforge
Download it, get it to compile/build/run
Read the documentation, get a feel for the code
Use the techniques in Working Effectively with Legacy Code to get a piece of it under test
Refactor that piece, perhaps fixing bug...
Rails: How to get the model class name based on the controller class name?
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It might be good to move the logic (for getting the model class) into a separate utility method. Even better if the result is stored in a constant, to speed up access. You can use new.controller_name.classify.constantize in the class definition.
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ruby system command check exit code
...tion:
system returns true if the command gives zero exit status, false for
non zero exit status. Returns nil if command execution fails.
system("unknown command") #=> nil
system("echo foo") #=> true
system("echo foo | grep bar") #=> false
Furthermore
An error st...
What to add for the update portion in ConcurrentDictionary AddOrUpdate
... key/value pair into the dictionary unconditionally, overwriting any value for that key if the key already exists: Use the indexer’s setter
(See: http://blogs.msdn.com/b/pfxteam/archive/2010/01/08/9945809.aspx)
The indexer is atomic, too. If you pass a function instead, it might not be:
Al...
How can I catch a ctrl-c event?
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For a Windows console app, you want to use SetConsoleCtrlHandler to handle CTRL+C and CTRL+BREAK.
See here for an example.
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Setting Vim whitespace preferences by filetype
At my work, I am required to follow the house style for indentation, which goes as follows:
5 Answers
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Eclipse and Windows newlines
...s mentioned here and here:
Set file encoding to UTF-8 and line-endings for new files to Unix, so that text files are saved in a format that is not specific to the Windows OS and most easily shared across heterogeneous developer desktops:
Navigate to the Workspace preferences (General:Wor...
C# constructor execution order
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The order is:
Member variables are initialized to default values for all classes in the hierarchy
Then starting with the most derived class:
Variable initializers are executed for the most-derived type
Constructor chaining works out which base class constructor is going to be called
Th...
Table Header Views in StoryBoards
...trol to the top of the table view. I didn't expect it to be that easy.
Before Drop
After Drop
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jQuery .hasClass() vs .is()
...ed method of determining whether an element is assigned a class, from a performance standpoint?
4 Answers
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