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Design Pattern for Undo Engine
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Most examples I've seen use a variant of the Command-Pattern for 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 execut...
What's the difference between the 'ref' and 'out' keywords?
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ref tells the compiler that the object is initialized before entering the function, while out tells the compiler that the object will be initialized inside the function.
So while ref is two-ways, out is out-only.
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Best way to create custom config options for my Rails app?
... You may need YAML::ENGINE.yamler = 'syck' for this to work stackoverflow.com/a/6140900/414220
– evanrmurphy
Mar 20 '12 at 21:59
45
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What are the differences in die() and exit() in PHP?
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aliases allows programmers to use the one which is comfortable with. I remember exit better than die. Some others remember die better than exit.
– mauris
Nov 25 '09 at 6:35
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How to exclude a module from a Maven reactor build?
...iles like this:
<project>
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<modules>
<module>common</module>
<module>foo</module>
<module>bar</module>
<modules>
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<profiles>
<profile>
<id>expensive-modules-to-build</id>
<mo...
In mocha testing while calling asynchronous function how to avoid the timeout Error: timeout of 2000
...elying on timeouts are fragile, and all my tests run in a few ms, but I do come across the same issue when using sinon-test. Still use lambdas 99% of the time.
– oligofren
Jun 12 '17 at 22:01
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How can I resize an image using Java?
...= scaledBI.createGraphics();
if (preserveAlpha) {
g.setComposite(AlphaComposite.Src);
}
g.drawImage(originalImage, 0, 0, scaledWidth, scaledHeight, null);
g.dispose();
return scaledBI;
}
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SQL Server: Query fast, but slow from procedure
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@BennettDill WITH RECOMPILE did not make a difference for me, only the local parameters.
– mrogers
Jan 26 '17 at 0:19
8
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Python loop that also accesses previous and next values
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144
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Why does comparing strings using either '==' or 'is' sometimes produce a different result?
...es are set to the value 'public' . In a conditional expression I have the comparison var1 is var2 which fails, but if I change it to var1 == var2 it returns True .
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