大约有 47,000 项符合查询结果（耗时：0.0531秒） [XML]
Swift class introspection & generics
...ype is a declaration but MyObject.self is a factory method (can be called) and myObject is a variable containing a reference to a factory method. The call myObject() would produce an instance of class MyObject. It would be better example if the name of myObject variable was myObjectFactory?
...
Why is the Java main method static?
...ntire class - sometimes you have an instance that hasn't been initialized, and you have to check for it in every method that could be called.
There are just too many edge cases and ambiguities for it to make sense for the JVM to have to instantiate a class before the entry point is called. That's ...
How to sort an ArrayList?
I have a List of doubles in java and I want to sort ArrayList in descending order.
20 Answers
...
Difference between getDefaultSharedPreferences and getSharedPreferences
What is the difference between getDefaultSharedPreferences and getSharedPreferences in Android? Can anyone please explain?
...
What is the way to quick-switch between tabs in Xcode 4
...
That should be command + shift + ..., I think. At least on my machine.
– Chris Ladd
Feb 7 '12 at 21:54
1
...
How do I check if a string is valid JSON in Python?
... can do something else with it. So far, I've only gotten the error message and type.
– Joey Blake
Apr 1 '11 at 12:36
2
...
Who is “us” and who is “them” according to Git?
After a Git rebase, and in other circumstances, you can find some files marked as deleted by us in the git status report. Who is us according to Git and why?
...
Can you use a trailing comma in a JSON object?
...ed to worry about all browsers.
In general I try turn the problem around, and add the comma before the actual value, so you end up with code that looks like this:
s.append("[");
for (i = 0; i < 5; ++i) {
if (i) s.append(","); // add the comma only if this isn't the first entry
s.appendF("\"...
How to split a string, but also keep the delimiters?
...
You can use Lookahead and Lookbehind. Like this:
System.out.println(Arrays.toString("a;b;c;d".split("(?<=;)")));
System.out.println(Arrays.toString("a;b;c;d".split("(?=;)")));
System.out.println(Arrays.toString("a;b;c;d".split("((?<=;)|(?=;...
UIActivityViewController crashing on iOS 8 iPads
... Xcode 6 (Beta 6). UIActivityViewController works fine with iPhone devices and simulators but crashes with iPad simulators and devices (iOS 8) with following logs
...