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What columns generally make good indexes?
As a follow up to " What are indexes and how can I use them to optimise queries in my database? " where I am attempting to learn about indexes, what columns are good index candidates? Specifically for an MS SQL database?
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warning about too many open figures
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Why should I declare a virtual destructor for an abstract class in C++?
...n not to declare it virtual in those cases.
[See item 4 in this article: http://www.gotw.ca/publications/mill18.htm]
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In log4j, does checking isDebugEnabled before logging improve performance?
...ava 8, you don't have to use isDebugEnabled() to improve the performance.
https://logging.apache.org/log4j/2.0/manual/api.html#Java_8_lambda_support_for_lazy_logging
import java.util.logging.Logger;
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Logger.getLogger("hello").info(() -> "Hello " + name);
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More than 10 lines in a node.js stack error?
...race that spans over setTimeout/setInterval calls, then more sophisticated https://github.com/mattinsler/longjohn would be the way to go.
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Best practices for overriding isEqual: and hash
...sh
{
return [self.name hash] ^ [self.data hash];
}
Solution found at http://nshipster.com/equality/ by Mattt Thompson (which also referred this question in his post!)
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Visual Studio Editor does not underline errors anymore
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For visual studio 2017 act according to HeeJae's comments in:
https://developercommunity.visualstudio.com/content/problem/113112/design-time-error-checking-isnt-working.html
i.e:
Hi. you are probably hitting a known issue. can you try this?
1.Update to latest release If that doesn’...
Which encoding opens CSV files correctly with Excel on both Mac and Windows?
We have a web app that exports CSV files containing foreign characters with UTF-8, no BOM. Both Windows and Mac users get garbage characters in Excel. I tried converting to UTF-8 with BOM; Excel/Win is fine with it, Excel/Mac shows gibberish. I'm using Excel 2003/Win, Excel 2011/Mac.
Here's all the ...
Chrome/jQuery Uncaught RangeError: Maximum call stack size exceeded
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`testl` eax against eax?
I am trying to understand some assembly.
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