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Best implementation for hashCode method for a collection
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Ruby on Rails: Where to define global constants?
... is probably the best place, if your colours are really global and used in more than one model context.
# put this into config/initializers/my_constants.rb
COLOURS = ['white', 'blue'].freeze
Note: when we define constants above, often we want to freeze the array. That prevents other code from lat...
Is returning null bad design? [closed]
...value. You might want to check out the Null Object Pattern which provides more information on this.
For example, if I were to define a method in Java that returned a Collection I would typically prefer to return an empty collection (i.e. Collections.emptyList()) rather than null as it means my cli...
What is polymorphism, what is it for, and how is it used?
...n include method overloading with different parameter types as well as the more pure form of polymorphism.
– paxdiablo
Apr 18 '17 at 3:21
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Evil Mode best practice? [closed]
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I used a highly customized vim, and now use an even more customized emacs. I think you'll find every instance of keymapping in my keymapping config file https://github.com/mbriggs/.emacs.d-oldv2/blob/master/init/init-keymaps.el
Keep in mind, I am rebinding stuff that real ema...
Git - Undo pushed commits
... and including the specified commits.
Look at the git-revert man page for more information about the git revert command. Also look at this answer for more information about reverting commits.
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How to execute a function when page has fully loaded?
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SVN upgrade working copy
...new format. This command may take a while, and for
some users, it may be more practical to simply checkout a new working
copy.
— Subversion 1.7 Release Notes
TortoiseSVN will perform the working copy upgrade with the next write operation:
Upgrading the Working Copy
Subversion 1.7 ...
“CAUTION: provisional headers are shown” in Chrome debugger
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Why is there no Tree class in .NET?
...ot B-Tree. They are differences whick people should be aware of. B-Tree is more optimal for a disk based tree or large memory based tree. More nodes are kept in the same locality so you get better processor cache performance and is quicker to read write to disk.
– AnthonyLamber...