大约有 40,000 项符合查询结果（耗时：0.0802秒） [XML]
How to change string into QString?
...ing you mean std::string you can do it with this method:
QString QString::fromStdString(const std::string & str)
std::string str = "Hello world";
QString qstr = QString::fromStdString(str);
If by string you mean Ascii encoded const char * then you can use this method:
QString QString::fro...
How to compare files from two different branches?
...compares master to HEAD).
You may also be interested in mybranch...master (from git diff docs):
This form is to view the changes on the branch containing and up to the second <commit>, starting at a common ancestor of both <commit>. git diff A...B is equivalent to git diff $(git-merge-b...
Do browsers send “\r\n” or “\n” or does it depend on the browser?
...hat to do with the contents of a TEXTAREA. (See, for instance, this thread from an HTML working group about the issue.)
Here's a quote from the HTTP/1.1 spec about message headers:
The line terminator for message-header fields is the sequence CRLF. However, we recommend that applications, when ...
Run single test from a JUnit class using command-line
I am trying to find an approach that will allow me to run a single test from a JUnit class using only command-line and java.
...
'any' vs 'Object'
...ember
c.doSomething(); // Error: c neither has doSomething nor inherits it from Object
and why
a.toString(); // Ok: whatever, dude, have it your way
b.toString(); // Ok: toString is defined in Object
c.toString(); // Ok: c inherits toString from Object
So Object and {} are equivalents in TypeSc...
Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...portant (so it doesn't matter which order to aggregate each of the results from each of the chunks). Strictly speaking commutativity is not necessary for parallelization, for example distributed sorting algorithms, it just makes the logic easier because you don't need to give your chunks an ordering...
Rails :dependent => :destroy VS :dependent => :delete_all
...te_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. So, if you can't destroy it or if each has their own :dependent, its callbacks can be called.
...
How do I create an empty array/matrix in NumPy?
...
A NumPy array is a very different data structure from a list and is designed to be used in different ways. Your use of hstack is potentially very inefficient... every time you call it, all the data in the existing array is copied into a new one. (The append function will h...
How is the java memory pool divided?
...
Heap memory
The heap memory is the runtime data area from which the Java VM allocates memory for all class instances and arrays. The heap may be of a fixed or variable size. The garbage collector is an automatic memory management system that reclaims heap memory for objects.
...
How to kill zombie process
... If the zombie is a dead process (already killed), how I remove it from the output of ps aux?
– MOHAMED
Jun 5 '13 at 16:19
...