大约有 40,000 项符合查询结果（耗时：0.0788秒） [XML]
How to join two sets in one line without using “|”
...
You can use union method for sets: set.union(other_set)
Note that it returns a new set i.e it doesn't modify itself.
share
|
improve this answer
|
f...
Unlink of file failed
...
That usually means a process is still using that specific file (still has an handle on it)
(on Windows, ProcessExplorer is good at tracking that kind of process)
Try closing your other programs, and try again your git pull.
Note th...
Add EBS to Ubuntu EC2 Instance
...ata that was on this volume previously.
Mount file system (with update to /etc/fstab so it stays mounted on reboot):
sudo mkdir -m 000 /vol
echo "/dev/xvdf /vol auto noatime 0 0" | sudo tee -a /etc/fstab
sudo mount /vol
s...
Why does Ruby have both private and protected methods?
...
# Comparable module will use this comparison method for >, <, ==, etc.
def <=>(other_dwarf)
# One dwarf is allowed to call this method on another
beard_strength <=> other_dwarf.beard_strength
end
def greet
"Lo, I am #{name}, and have mined these #{age} years.\...
Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
...the pointer to void * as in printf("%p", (void *)str); When printing a size_t with printf, you should use "%zu" if using the latest C standard (C99).
– Chris Young
Oct 3 '08 at 7:44
...
How to activate JMX on my JVM for access with jconsole?
...warded the ports when running the docker image: -p 9998:9998, -p 9999:9999 etc.
– Barney
Aug 6 '19 at 3:23
add a comment
|
...
Is nested function a good approach when required by only one function? [closed]
...
>>> def sum(x, y):
... def do_it():
... return x + y
... return do_it
...
>>> a = sum(1, 3)
>>> a
<function do_it at 0xb772b304>
>>> a()
4
Is this what you were looking for? It's called a closure.
...
How to declare a global variable in JavaScript?
...s available only in browsers. Could you edit you answer to make it work in all environments? See How to get the global object in JavaScript?
– Michał Perłakowski
Nov 30 '16 at 15:50
...
Do you have to put Task.Run in a method to make it async?
...<T> or one of its shortcuts (TaskFactory.FromAsync, Task.FromResult, etc). I don't recommend wrapping an entire method in Task.Run; synchronous methods should have synchronous signatures, and it should be left up to the consumer whether it should be wrapped in a Task.Run:
private int DoWork()...
How to compare two colors for similarity/difference
...sitive to green than red or blue, our brightness perception is logrithmic, etc. OP never specified which s/he wants; but see here for an algorithm specially-tailored for human sight.
– BlueRaja - Danny Pflughoeft
Jan 26 '12 at 17:57
...