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What are the GCC default include directories?
When I compile a very simple source file with gcc I don't have to specify the path to standard include files such as stdio or stdlib.
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[精华] VC中BSTR、Char和CString类型的转换 - C/C++ - 清泛网 - 专注C/C++及内核技术
...：
BSTR bstrText = _bstr_t("This is a test");
方法四，使用CComBSTR。例如：
BSTR bstrText = CComBSTR("This is a test"); 或
CComBSTR bstr("This is a test");
BSTR bstrText = bstr.m_str;
方法五，使用ConvertStringToBSTR。例如：
char* lpszText = "Test";
BS...
What's the purpose of git-mv?
...?
$ git add *
$ git commit -m "change"
$ git log c
commit 0c5425be1121c20cc45df04734398dfbac689c39
Author: Sergey Orshanskiy <*****@gmail.com>
Date: Sat Oct 12 00:24:56 2013 -0400
change
and then
$ git log --follow c
Author: Sergey Orshanskiy <*****@gmail.com>
Date: Sat O...
Finding what branch a Git commit came from
...61-g84e48b6 is on v2.6.12-n
[...]
This program does not take into account the effects of cherry-picking the commit of interest, only merge operations.
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Detect if stdin is a terminal or pipe?
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./test /dev/tty OK YES S_ISCHR
./test ≺ test.cc /dev/tty OK NO S_ISREG
cat test.cc | ./test /dev/tty OK NO S_ISFIFO
echo ./test | at now /dev/tty FAIL NO S_ISREG
The results are from a Ubuntu Linux 11.04 system using followi...
How update the _id of one MongoDB Document?
...store the document in a variable
doc = db.clients.findOne({_id: ObjectId("4cc45467c55f4d2d2a000002")})
// set a new _id on the document
doc._id = ObjectId("4c8a331bda76c559ef000004")
// insert the document, using the new _id
db.clients.insert(doc)
// remove the document with the old _id
db.client...
Automatically plot different colored lines
...ould use a colormap such as HSV to generate a set of colors. For example:
cc=hsv(12);
figure;
hold on;
for i=1:12
plot([0 1],[0 i],'color',cc(i,:));
end
MATLAB has 13 different named colormaps ('doc colormap' lists them all).
Another option for plotting lines in different colors is to use ...
Add shadow to custom shape on Android
...shape android:shape="rectangle" >
<solid android:color="#cc2b2b" />
<corners android:radius="8dp" />
</shape>
</item>
<!-- over left shadow -->
<item>
<shape android:shape="rectangle" >
<...
How can I access my localhost from my Android device?
I'm able to access my laptop web server using the Android emulator, I'm using 10.0.2.2:portno
works well.
39 Answers
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Foreign keys in mongo?
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> db.foo.find()
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "group" : "phones" }
{ "_id" : ObjectId("4df6540fe90592692ccc9941"), "group" : "phones" }
>db.foo.find({'_id':ObjectId("4df6539ae90592692ccc9940")})
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "group" : "ph...