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Multi-line commands in GHCi
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Most of the time, you can rely on type inference to work out a signature for you. In your example, the following is sufficient:
Prelude> let addTwo x y = x + y
If you really want a definition with a type signature, or your definition spans over multiple lines, you can do this in ghci:
Prelu...
What is the type of lambda when deduced with “auto” in C++11?
I had a perception that, type of a lambda is a function pointer. When I performed following test, I found it to be wrong ( demo ).
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Do I need a content-type header for HTTP GET requests?
... its type.
It means that the Content-Type HTTP header should be set only for PUT and POST requests.
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CMFCTabCtrl的使用、颜色样式调整 - C/C++ - 清泛网 - 专注C/C++及内核技术
...LSE);
2.为CMFCTabCtrl设置Tab标签的图标:
m_wndTab.SetImageList (IDB_ICONS, 16, RGB (255, 0,255));
m_wndTab.SetTabIcon (nTab, nTab);
m_wndTab.RecalcLayout ();
m_wndTab.RedrawWindow ();
3.设置CMFCTabCtrl的样式：
m_wndTab.ModifyTabStyle (style);
m_wndTab.RecalcLayout ();
m_wn...
How to make Git pull use rebase by default for all my repositories?
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There are now 3 different levels of configuration for default pull behaviour. From most general to most fine grained they are:
1. pull.rebase
Setting this to true means that git pull is always equivalent to git pull --rebase (unless branch.<branchname>.rebase is expl...
Having links relative to root?
...rc attributes, with a / will make the path relative to the root directory. For example, given the html page at www.example.com/fruits/apples.html, the a of href="/vegetables/carrots.html" will link to the page www.example.com/vegetables/carrots.html.
The base tag element allows you to specify the b...
What is the difference between the $parse, $interpolate and $compile services?
...s the difference between $parse , $interpolate and $compile services?
For me they all do the same thing: take template and compile it to template-function.
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How to use Bash to create a folder if it doesn't already exist?
... command, which expects string "]" as a last argument, so the whitespace before the closing bracket (as well as between "!" and "-d" which need to be two separate arguments too) is important:
if [ ! -d /home/mlzboy/b2c2/shared/db ]; then
mkdir -p /home/mlzboy/b2c2/shared/db;
fi
Second, since yo...
How do I get logs/details of ansible-playbook module executions?
... to ansible-playbook on the command line, you'll see the stdout and stderr for each task executed:
$ ansible-playbook -v playbook.yaml
Ansible also has built-in support for logging. Add the following lines to your ansible configuration file:
[defaults]
log_path=/path/to/logfile
Ansible will l...
C++ equivalent of Java's toString?
I'd like to control what is written to a stream, i.e. cout , for an object of a custom class. Is that possible in C++? In Java you could override the toString() method for similar purpose.
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