大约有 45,000 项符合查询结果（耗时：0.0675秒） [XML]
MYSQL OR vs IN performance
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I needed to know this for sure, so I benchmarked both methods. I consistenly found IN to be much faster than using OR.
Do not believe people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the ...
Make an HTTP request with android
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Note: The Apache HTTP Client bundled with Android is now deprecated in favor of HttpURLConnection. Please see the Android Developers Blog for more details.
Add <uses-permission android:name="android.permission.INTERNET" /> to your manifest.
You would then retrieve a web...
How to extract the n-th elements from a list of tuples?
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@Wayne Werner: Yep. This stuff was all just passive knowledge (I don't often use it) - but it's good to be reminded now and then so you know where / what to look for...
– Daren Thomas
Jul 22 '10 at 13:14
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Visual Studio: How do I show all classes inherited from a base class?
... and select Base Types, which will take you to ActionResult, which you can now right-click on and select Derived Types. (If you have no type that derives from ActionResult then you could work your way back to System.Object and then down to ActionResult.)
– yoyo
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parsing JSONP $http.jsonp() response in angular.js
...r for
specifying where the callback parameter value should go
You must now define the callback like so:
$http.jsonp('some/trusted/url', {jsonpCallbackParam: 'callback'})
Change/access/declare param via $http.defaults.jsonpCallbackParam, defaults to callback
Note: You must also make sure your ...
How to show changed file name only with git log? [duplicate]
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Now I use the following to get the list of changed files my current branch has, comparing it to master (the compare-to branch is easily changed):
git log --oneline --pretty="format:" --name-only master.. | awk 'NF' | sort -u...
Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AS” and “Latin1_General_CI_
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marc i'm getting this now: Cannot alter or drop column because it is enabled for Full-Text Search.
– jhowe
Oct 22 '09 at 14:58
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implements Closeable or implements AutoCloseable
...se() throws Exception {
System.out.println("Closing!");
}
}
Now you can say:
try (MyResource res = new MyResource()) {
// use resource here
}
and JVM will call close() automatically for you.
Closeable is an older interface. For some reason To preserve backward compatibility, l...
setTimeout or setInterval?
...r for many years was IE Mobile in WinMo <6.5, but hopefully that too is now behind us.
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Java synchronized method lock on object, or method?
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}
I think if the Java designers knew then what is understood now about synchronization, they would not have added the syntactical sugar, as it more often than not leads to bad implementations of concurrency.
sh...