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Java ByteBuffer to String
...wers may not work with a ByteBuffer that's been created through ByteBuffer.allocateDirect().
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Return a “NULL” object if search result not found
... boost::optional does not involve much overhead (no dynamic allocation), which is why it's so great. Using it with polymorphic values requires wrapping references or pointers.
– Matthieu M.
Apr 14 '10 at 18:09
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How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
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@phatmann Concatenation with Array#concat does not allocate a new array, Concatenation with Array#+ does
– cbliard
Jul 21 '14 at 9:19
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How is the default max Java heap size determined?
...cts to require it. A much smaller amount, termed the initial heap size, is allocated during JVM initialization. ...
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Server JVM heap configuration ergonomics are now the same as the Client, except that the default maximum heap size for 32-bit JVMs is 1 gigabyte, corresponding to a physical me...
莱昂氏unix源代码分析 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
... 初始化、进程初始化
第5章 两个文件 241
5.1 文件malloc.c 241
5.1.1 列表维护规则 241
5.1.2 malloc(2528) 242
5.1.3 mfree(2556) 243
5.1.4 结论 244
5.2 文件prf.c 244
5.2.1 printf(2340) 244
5.2.2 printn(2369) 245
5.2.3 putchar(2386) 246
5.2.4 p...
Convert any object to a byte[]
... unmanaged buffers required.
var bytes = new byte[size];
var ptr = Marshal.AllocHGlobal(size);
// Copy object byte-to-byte to unmanaged memory.
Marshal.StructureToPtr(your_object, ptr, false);
// Copy data from unmanaged memory to managed buffer.
Marshal.Copy(ptr, bytes, 0, size);
// Release unmanag...
Improve INSERT-per-second performance of SQLite
...formed (which in this loop is always the case). This will save you several allocate, copy and deallocate operations per loop. Possibly a large improvement.
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.NET HashTable Vs Dictionary - Can the Dictionary be as fast?
...est - SortedList vs. SortedDictionary vs. Dictionary vs. Hashtable
Memory allocation:
Time used for inserting:
Time for searching an item:
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Convert HTML to NSAttributedString in iOS
...can initialize an NSAttributedString using HTML, eg:
[[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUTF8StringEncoding]
options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
NSCharact...
Why are exclamation marks used in Ruby methods?
... convention, the names of procedures
that store values into previously
allocated locations (see section 3.4)
usually end in ``!''. Such procedures
are called mutation procedures. By
convention, the value returned by a
mutation procedure is unspecified.
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