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Print a string as hex bytes?
... !! and I want to print it using Python as 48:65:6c:6c:6f:20:77:6f:72:6c:64:20:21:21 .
13 Answers
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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...
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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HTTP Error 403.14 - Forbidden - The Web server is configured to not list the contents of this direct
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answered Aug 16 '14 at 15:09
user3943211user3943...
Post data to JsonP
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It is not possible to do an asynchronous POST to a service on another domain, due to the (quite...
PostgreSQL function for last inserted ID
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See the RETURNING clause of the INSERT statement. Basically, the INSERT doubles as a query and ...
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...
Timer function to provide time in nano seconds using C++
...// x
All this clock does is count CPU cycles and store it in an unsigned 64-bit integer. You may need to tweak the assembly language syntax for your compiler. Or your compiler may offer an intrinsic you can use instead (e.g. now() {return __rdtsc();}).
To build a clock you have to give it the r...
How does one make random number between range for arc4random_uniform()?
...means of converting to a common integer type. In this example I'm using Int64 which is large enough for my purposes, but if you're using unsigned integers or have an Int128 or Int256 custom type you should use those.
public func randomNumber<T : SignedInteger>(inRange range: ClosedRange<T&...