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How to export all collections in MongoDB?
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Xavier Guihot
23.7k1414 gold badges132132 silver badges9696 bronze badges
answered May 17 '13 at 9:31
Mentor RekaMen...
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
... community wiki
6 revs, 3 users 86%Lambdageek
10
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What is the difference between #include and #include “filename”?
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quest49quest49
39.4k44 gold badges1818 silver badges1414 bronze badges
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代码坏味道(总结) - C/C++ - 清泛网 - 专注C/C++及内核技术
...(过长函数)
函数体尽量简短,内聚性要变强。
3.Large Class(过大的类)
类不可太大,不可做太多的事情,应将与该类关联不大或不相关的事情交与其他类或函数处理。
4.Long Parameter List(过长的参数列)
函数...
Linux Shell中 if else及大于、小于、等于逻辑表达式写法 - C/C++ - 清泛网...
...ME=`ls $DIR| grep leveldb | head -n 1 | awk '{print $NF}'`
if [[ $NUM -gt 3 ]];then
rm -rf $DIR/$DIRNAME
echo "---------$DAY----($DIR)-----------------------" >> /tmp/img_cache.log
echo "$DIRNAME Deleted successful" >> /tmp/img_cache.log
fi
if -z -n -f -eq -ne -lt
ATL COM开发入门(二)(ActiveX/COM组件回调JS) - C/C++ - 清泛网 - 专注C/C++及内核技术
...ATL中任意获取网页元素,进行Invoke调用。
定时器采用Win32 API的SetTimer,在回调函数中回调前台js函数,显示计数。
一、ATLDemo.idl 中添加一个新的接口:
BeginTiming函数体:
STDMETHODIMP CAtlDemoIf::BeginTiming(IDispatch* pIDispatch)
{
gI...
Eclipse C++启用pretty printing,更直观显示stl变量内容 - C/C++ - 清泛网...
...
$ cd /home/qpzhou
$ svn co svn://gcc.gnu.org/svn/gcc/trunk/libstdc++-v3/python
2、新建一个gdb命令文件:
$ subl /home/qpzhou/.gdbinit
3、内容如下:
python
import sys
sys.path.insert(0, '/home/qpzhou/python/')
from libstdcxx.v6.printers import register_libstdcxx_printer...
Getting SyntaxError for print with keyword argument end=' '
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Are you sure you are using Python 3.x? The syntax isn't available in Python 2.x because print is still a statement.
print("foo" % bar, end=" ")
in Python 2.x is identical to
print ("foo" % bar, end=" ")
or
print "foo" % bar, end=" "
i.e. as a call to...
Linux C/C++程序常用的调试手段及异常排查总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...份代码编完需要 10 分钟以上,Linux 下直接ndk-build -j20,2~3 分钟就搞定,而且编译服务器所有人共享。
性能调优,你写出来的代码,你如何知道它有没有坑呢? 怎么知道它是完美的呢? 我们需要一款计分工具,Linux下常用的有 g...
How can mixed data types (int, float, char, etc) be stored in an array?
... element, you would do:
my_array[0].type = is_int;
my_array[0].val.ival = 3;
When you want to access an element of the array, you must first check the type, then use the corresponding member of the union. A switch statement is useful:
switch (my_array[n].type) {
case is_int:
// Do stuff for ...
