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IllegalArgumentException or NullPointerException for a null parameter? [closed]
...dited May 14 '17 at 11:46
user719662
answered Aug 6 '08 at 19:29
Greg HurlmanGreg Hurlman
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StringBuilder vs String concatenation in toString() in Java
...'ve tried this example to test the speed. So my results are: slow elapsed 29672 ms; fast elapsed 15 ms. So the answer is obvious. But if it would be 100 iterations - time is the same - 0 ms. If 500 iterations - 16 ms and 0 ms. And so on.
– Ernestas Gruodis
Aug ...
Json.net serialize/deserialize derived types?
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You have to enable Type Name Handling and pass that to the (de)serializer as a settings paramet...
Authenticate with GitHub using a token
...fOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==" > ~/.ssh/known_hosts
Not...
Why doesn't .NET/C# optimize for tail-call recursion?
...ate given recent JIT changes). Note that the CLR changes for 4.0 the x86, x64 and ia64 will respect it.
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Volatile vs. Interlocked vs. lock
... don't know and don't care and that's the point of cache coherency of x86/x64). All the posts earlier by others who mentioned instruction reordering simply show they don't understand x86/x64 architectures. Volatile does not issue read/write barriers as implied by the earlier posts saying 'it prevent...
How can I delete all Git branches which have been merged?
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This also works to delete all merged branches except master.
git branch --merged | grep -v '^*...
How to customize a Spinner in Android
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You can create fully custom spinner design like as
Step1: In drawable folder make background.x...
what's the correct way to send a file from REST web service to client?
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I don't recommend encoding binary data in base64 and wrapping it in JSON. It will just needlessly increase the size of the response and slow things down.
Simply serve your file data using GET and application/octect-streamusing one of the factory methods of javax.ws.rs.c...
通过 ulimit 改善系统性能 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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设置硬资源限制，一旦设置不能增加。
ulimit – Hs 64；限制硬资源，线程栈大小为 64K。
-S
设置软资源限制，设置后可以增加，但是不能超过硬资源设置。
ulimit – Sn 32；限制软资源，32 个文件描述符。
-a...