大约有 48,000 项符合查询结果（耗时：0.1172秒） [XML]
Scala: Nil vs List()
In Scala, is there any difference at all between Nil and List() ?
3 Answers
3
...
What's the correct way to convert bytes to a hex string in Python 3?
...ly no longer awkward:
>>> b'\xde\xad\xbe\xef'.hex()
'deadbeef'
and reverse:
>>> bytes.fromhex('deadbeef')
b'\xde\xad\xbe\xef'
works also with the mutable bytearray type.
Reference: https://docs.python.org/3/library/stdtypes.html#bytes.hex
...
Rails 3: Get Random Record
So, I've found several examples for finding a random record in Rails 2 -- the preferred method seems to be:
14 Answers
...
Setting Icon for wpf application (VS 08)
...
Assuming you use VS Express and C#.
The icon is set in the project properties page. To open it right click on the project name in the solution explorer. in the page that opens, there is an Application tab, in this tab you can set the icon.
...
Java, Classpath, Classloading => Multiple Versions of the same jar/project
...reference to the class you are trying to load, it delegates to its parent, and so on, until you get to the bootstrap class loader. If none of them find a reference to the class you are trying to load you get a ClassNotFoundException.
If you have two classes with the same binary name, searchable by t...
When and why are database joins expensive?
I'm doing some research into databases and I'm looking at some limitations of relational DBs.
7 Answers
...
git remote prune – didn't show as many pruned branches as I expected
...l branches (not tracking branches) are not touched by git remote prune command and should be removed manually.
Now, a real-world example for better understanding:
You have a remote repository with 2 branches: master and feature. Let's assume that you are working on both branches, so as a result yo...
variable === undefined vs. typeof variable === “undefined”
...ation marks (typeof foo; // -> "undefined") to emphasise it is a string and not the primitive value undefined.
– c24w
Apr 19 '13 at 16:06
...
Break when exception is thrown
...l Studio has an option to break automatically into the debugger when an unhandled exception is thrown, does Eclipse have similar functionality?
...
How do I concatenate two strings in C?
...e that the function returns a block of heap allocated memory to the caller and passes on ownership of that memory. It is the responsibility of the caller to free the memory when it is no longer needed.
Call the function like this:
char* s = concat("derp", "herp");
// do things with s
free(s); // d...