大约有 30,000 项符合查询结果（耗时：0.0442秒） [XML]
Understanding __get__ and __set__ and Python descriptors
...ith the Temperature class). For example:
temp=Temperature()
temp.celsius #calls celsius.__get__
Accessing the property you assigned the descriptor to (celsius in the above example) calls the appropriate descriptor method.
instance in __get__ is the instance of the class (so above, __get__ would ...
What is the purpose of a stack? Why do we need it?
...rs like the C# compiler generate CIL, and then at runtime another compiler called the JIT (Just In Time) compiler turns the IL into actual machine code that can execute.
So first let's answer the question "why have MSIL at all?" Why not just have the C# compiler write out machine code?
Because i...
How do I get the height and width of the Android Navigation Bar programmatically?
...navigation bar on the bottom of the screen is not easily removable in Android. It has been part of Android since 3.0 as a replacement for hardware buttons. Here is a picture:
...
Do the parentheses after the type name make a difference with new?
...erated as opposed to user-defined.
new C - default-initializes C, which calls the default ctor.
new C() - value-initializes C, which calls the default ctor.
So in all versions of C++ there's a difference between new A and new A() because A is a POD.
And there's a difference in behavior betwee...
How to get JSON response from http.Get
...uction as this answer originally demonstrated! (Which is what http.Get/etc call to). The reason is that the default client has no timeout set; if the remote server is unresponsive, you're going to have a bad day.
share
...
How do I include inline JavaScript in Haml?
...
Haml did not add CDATA for me, nor did %script work for me if there were any irregular indentations in the js.
– agmin
Oct 24 '13 at 20:46
...
onMeasure custom view explanation
...als, but each one is a little bit different than the other. Sometimes they call super.onMeasure at the end, sometimes they use setMeasuredDimension and didn't call it. Where is a difference?
...
What is the use of static constructors?
... required configuration data into readonly fields, etc.
It is run automatically by the runtime the first time it is needed (the exact rules there are complicated (see "beforefieldinit"), and changed subtly between CLR2 and CLR4). Unless you abuse reflection, it is guaranteed to run at most once (ev...
Update ViewPager dynamically?
... solution is to override getItemPosition(). When notifyDataSetChanged() is called, ViewPager calls getItemPosition() on all the items in its adapter to see whether they need to be moved to a different position or removed.
By default, getItemPosition() returns POSITION_UNCHANGED, which means, "This...
How to call shell commands from Ruby
How do I call shell commands from inside of a Ruby program? How do I then get output from these commands back into Ruby?
20...