大约有 40,000 项符合查询结果(耗时:0.0515秒) [XML]

https://stackoverflow.com/ques... 

Zero-pad digits in string

... First of all, your description is misleading. Double is a floating point data type. You presumably want to pad your digits with leading zeros in a string. The following code does that: $s = sprintf('%02d', $digit); For more informa...
https://stackoverflow.com/ques... 

How can I create an error 404 in PHP?

My .htaccess redirects all requests to /word_here to /page.php?name=word_here . The PHP script then checks if the requested page is in its array of pages. ...
https://stackoverflow.com/ques... 

How to call a stored procedure from Java and JPA

I am writing a simple web application to call a stored procedure and retrieve some data. Its a very simple application, which interacts with client's database. We pass employee id and company id and the stored procedure will return employee details. ...
https://stackoverflow.com/ques... 

Equivalent C++ to Python generator pattern

...to signal termination In your trivial example, it's easy enough. Conceptually: struct State { unsigned i, j; }; State make(); void next(State&); bool isDone(State const&); Of course, we wrap this as a proper class: class PairSequence: // (implicit aliases) public std::iterat...
https://stackoverflow.com/ques... 

How to define “type disjunction” (union types)?

...str") case _: Int => println("int") } } And that's it. You can call foo(5) or foo("abc"), and it will work, but try foo(true) and it will fail. This could be side-stepped by the client code by creating a StringOrInt[Boolean], unless, as noted by Randall below, you make StringOrInt a seale...
https://stackoverflow.com/ques... 

Close iOS Keyboard by touching anywhere using Swift

I have been looking all over for this but I can't seem to find it. I know how to dismiss the keyboard using Objective-C but I have no idea how to do that using Swift ? Does anyone know? ...
https://stackoverflow.com/ques... 

Python Pandas: Get index of rows which column matches certain value

... frame (whose data may be gibabytes). What about dftest? Doesn't this also allocate a very large intermediate object where the returned index may be very small, or even empty. Are these magically optimized away using lazy views. If not then surely there must be an efficient way. ...
https://stackoverflow.com/ques... 

Pythonic way to check if a list is sorted or not

... Actually we are not giving the answer anijhaw is looking for. Here is the one liner: all(l[i] <= l[i+1] for i in xrange(len(l)-1)) For Python 3: all(l[i] <= l[i+1] for i in range(len(l)-1)) ...
https://stackoverflow.com/ques... 

Compiling problems: cannot find crt1.o

... that's 64bit. You need the 32bit support files. For that, you need to install them sudo apt install gcc-multilib share | improve this answer | follow | ...
https://stackoverflow.com/ques... 

git: How to ignore all present untracked files?

Is there a handy way to ignore all untracked files and folders in a git repository? (I know about the .gitignore .) 8 An...