大约有 19,300 项符合查询结果（耗时：0.0335秒） [XML]
Why does this (null || !TryParse) conditional result in “use of unassigned local variable”?
...aded true operator.
The || operator will invoke the true operator to decide whether to evaluate the right-hand side, and then the if statement will invoke the true operator to decide whether to evaluate the its body. For a normal bool, these will always return the same result and so exactly one ...
Explaining difference between automaticallyAdjustsScrollViewInsets, extendedLayoutIncludesOpaqueBars
...ies:
edgesForExtendedLayout
Basically, with this property you set which sides of your view can be extended to cover the whole screen. Imagine that you push a UIViewController into a UINavigationController. When the view of that view controller is laid out, it will start where the navigation bar en...
Why is it possible to recover from a StackOverflowError?
...nt of which exception is thrown and why. Since you catch the exception outside of the first call to foo(), the thousands of foo stack frames that filled the stack have all been unwound and most of the stack is free to be used again.
...
How does Git handle symbolic links?
...p to the user to either remove or change the link to point to something valid if needed.
share
|
improve this answer
|
follow
|
...
What exactly do “IB” and “UB” mean?
...ns fly out of your nose.
Using undefined behaviour is nearly always a bad idea. Even if it seems to work sometimes, any change to environment, compiler or platform can randomly break your code.
share
|
...
What arguments are passed into AsyncTask?
...
Google's Android Documentation Says that :
An asynchronous task is defined by 3 generic types, called Params, Progress and Result, and 4 steps, called onPreExecute, doInBackground, onProgressUpdate and onPostExecute.
AsyncTask's generic ...
What are the disadvantages to declaring Scala case classes?
...t the good bits:
Everything immutable by default
Yes, and can even be overridden (using var) if you need it
Getters automatically defined
Possible in any class by prefixing params with val
Decent toString() implementation
Yes, very useful, but doable by hand on any class if necessary
Compliant equal...
Is it possible to make a type only movable and not copyable?
...he type doesn't have a Drop implementation.
To answer the question you didn't ask... "what's up with moves and copy?":
Firstly I'll define two different "copies":
a byte copy, which is just shallowly copying an object byte-by-byte, not following pointers, e.g. if you have (&usize, u64), it...
How do I associate file types with an iPhone application?
... </array>
</dict>
</array>
Two images are provided that will be used as icons for the supported types in Mail and other applications capable of showing documents. The LSItemContentTypes key lets you provide an array of Uniform Type Identifiers (UTIs) that your applicati...
Shell equality operators (=, ==, -eq)
... ]; echo "$?" # wrong
-bash: [: foo: integer expression expected
2
(Side note: Quote those variable expansions! Do not leave out the double quotes above.)
If you're writing a #!/bin/bash script then I recommend using [[ instead. The doubled form has more features, more natural syntax, and few...