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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...creating replication oplog of size: 990MB...
Sun Dec 29 20:26:13.849 [FileAllocator] allocating new datafile /data/mongodbtest/replset/data/local.1, filling with zeroes...
Sun Dec 29 20:26:13.862 [FileAllocator] done allocating datafile /data/mongodbtest/replset/data/local.1, size: 1024MB, took 0...
Using Default Arguments in a Function
I am confused about default values for PHP functions. Say I have a function like this:
12 Answers
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How do you deal with configuration files in source control?
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I use this approach, I just have a main.php.tmpl and when I checkout a new copy just copy it to main,php. I add the main.php file to the ignore list to avoid commit it by accident.
– levhita
Sep 15 '08 at 18:10
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In a Git repository, how to properly rename a directory?
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The token '&&' is not a valid statement separator in this version. git version 2.11.0.windows.
– Tim Hardy
Jun 26 '17 at 21:09
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Is there any advantage of using map over unordered_map in case of trivial keys?
... vs list) , the default process heap (talking Windows here) is serialized. Allocating (small) blocks in large quantities in a multithreaded application is very expensive.
– ROAR
Feb 4 '10 at 3:06
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C# vs C - Big performance difference
...cation (both in release build). Since the C# application is very basic and allocates the memory used in the loop on the stack and not on the heap, it is actually performing a lot better than a real application involved in objects, heavy computations and with larger data-sets. So the figures provided...
C pointers : pointing to an array of fixed size
...sing technique is the dominance of naive approach to typing of dynamically allocated arrays. For example, if the program calls for fixed arrays of type char[10] (as in your example), an average developer will malloc such arrays as
char *p = malloc(10 * sizeof *p);
This array cannot be passed to a...
Version vs build in Xcode
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OT: You have a leak in your method - you alloc/init the string, which retains the string, but you're not releasing it. On an object you return from a method, you should generally use a convenience method so the string is autoreleased automatically, or call autorelea...
Is there a performance difference between i++ and ++i in C++?
... What the compiler can avoid is the second copy to return tmp, by allocating tmp in the caller, through NRVO, as mentioned by another comment.
– Blaisorblade
Jan 15 '09 at 0:13
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Why does this method print 4?
... to Java Virtual Machine Specifications for JAVA 6,
frames may be heap allocated.
So, when a frame is created, there should be enough heap space to create a stack frame and enough stack space to store the new reference which point to the new stack frame if the frame is heap allocated.
Now let...