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Design Pattern for Undo Engine
...this. Every user-action that's undoable gets its own command instance with all the information to execute the action and roll it back. You can then maintain a list of all the commands that have been executed and you can roll them back one by one.
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In mocha testing while calling asynchronous function how to avoid the timeout Error: timeout of 2000
In my node application I'm using mocha to test my code. While calling many asynchronous functions using mocha, I'm getting timeout error ( Error: timeout of 2000ms exceeded. ). How can I resolve this?
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How to create a remote Git repository from a local one?
...tracker for your local repository (git remote add origin URL), and then locally you just say git push origin master. Now any other repository can pull from the remote repository.
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What is the difference/usage of homebrew, macports or other package installation tools? [closed]
...t exist.
MacPorts is a native application: C + TCL. You don't need Ruby at all. To install Ruby on Mac OS X you might need MacPorts, so just go with MacPorts and you'll be happy.
MacPorts is really stable, in 8 years I never had a problem with it, and my entire Unix ecosystem relay on it.
If you are...
Cannot generate iOS App archive in xcode
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Check Build Settings:
Skip install is NO for the main project target
Skip install is YES for framework (sub-projects) targets
In Build Phases for sub-projects, Copy Headers needs to be in Project, not Public (does not apply if building static library)
Inst...
resize ipython notebook output window
By default the ipython notebook ouput is limited to a small sub window at the bottom. This makes us force to use separate scroll bar that comes with the output window, when the output is big.
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Good Free Alternative To MS Access [closed]
...ication language and environment (VBA), and report designer. When you take all those things together, MS Access really has no peer.
But for the scope of this question, we're concerned with the raw database engine. With that in mind:
SQLlite,
Firebird,
VistaDB (not free),
SQL Server Compact Edition...
Why is the tag deprecated in HTML?
...n property to center. This guarantees that the element will be centered in all modern browsers.
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JOIN queries vs multiple queries
...ase. It depends on a lot of things. Jeff Atwood (founder of this site) actually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 trip than several.
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Correct way to use StringBuilder in SQL
... of using StringBuilder, i.e reducing memory. Is it achieved?
No, not at all. That code is not using StringBuilder correctly. (I think you've misquoted it, though; surely there aren't quotes around id2 and table?)
Note that the aim (usually) is to reduce memory churn rather than total memory used...