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How can I maintain fragment state when added to the back stack?
...sion 1. Use version 2)
public class FragmentA extends Fragment {
View _rootView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (_rootView == null) {
// Inflate the layout for this fragment
_...
if A vs if A is not None:
...
The statement
if A:
will call A.__nonzero__() (see Special method names documentation) and use the return value of that function. Here's the summary:
object.__nonzero__(self)
Called to implement truth value testing and the built-in operation bool()...
Pass a parameter to a fixture function
...ata during the tests and do more processing afterwards. As I have many test_... files I want to reuse the tester object creation (instance of MyTester) for most of my tests.
...
Callback functions in C++
...ard algorithms library <algorithm> use callbacks. For example the for_each algorithm applies an unary callback to every item in a range of iterators:
template<class InputIt, class UnaryFunction>
UnaryFunction for_each(InputIt first, InputIt last, UnaryFunction f)
{
for (; first != las...
Dynamically load JS inside JS [duplicate]
...
and use it like:
if (typeof someObject == 'undefined') $.loadScript('url_to_someScript.js', function(){
//Stuff to do after someScript has loaded
});
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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
...建一个CMFCTabCtrl，并给其添加4个CEdit:
CRect rectTab;
CEdit m_wnd1;
CEdit m_wnd2;
CEdit m_wnd3;
CEdit m_wnd4;
CMFCTabCtrl m_wndTab;
m_wndTabLoc.GetWindowRect (&rectTab);
ScreenToClient (&rectTab);
m_wndTab.Create (CMFCTabCtrl::STYLE_3D, rectTab, this, 1,
CMFCTabCtrl::...
Is there a way to make GHC provide the type class constraints of typed holes?
...ing, this isn't immediately obvious in GHCi. With your example,
> show _
<interactive>:7:6: error:
• Found hole: _h :: ()
Or perhaps ‘_h’ is mis-spelled, or not in scope
• In the first argument of ‘show’, namely ‘_h’
In the expression: show _h
I...
Using generic std::function objects with member functions in one class
...int)> f = std::bind(&Foo::doSomethingArgs, this, std::placeholders::_1, std::placeholders::_2);
Or, if your compiler supports C++11 lambdas:
std::function<void(int,int)> f = [=](int a, int b) {
this->doSomethingArgs(a, b);
}
(I don't have a C++11 capable compiler at hand rig...
How to do a less than or equal to filter in Django queryset?
...
Less than or equal:
User.objects.filter(userprofile__level__lte=0)
Greater than or equal:
User.objects.filter(userprofile__level__gte=0)
Likewise, lt for less than and gt for greater than. You can find them all in the documentation.
...
SQL: deleting tables with prefix
How to delete my tables who all have the prefix myprefix_ ?
10 Answers
10
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