大约有 36,010 项符合查询结果（耗时：0.0391秒） [XML]
How can I check for Python version in a program that uses new language features?
... test using eval:
try:
eval("1 if True else 2")
except SyntaxError:
# doesn't have ternary
Also, with is available in Python 2.5, just add from __future__ import with_statement.
EDIT: to get control early enough, you could split it into different .py files and check compatibility in the main...
Difference between API and ABI
...dware. So at runtime there's lots of Binary level action going on which we don't usually see.
share
|
improve this answer
|
follow
|
...
How to log out user from web site using BASIC authentication?
...
Basic Authentication wasn't designed to manage logging out. You can do it, but not completely automatically.
What you have to do is have the user click a logout link, and send a ‘401 Unauthorized’ in response, using the same realm and at the same URL folder level as the normal 401 you se...
In Python, how do I create a string of n characters in one line of code?
...gives you "xxxxxxxxxx"
And if you want something more complex, like n random lowercase letters, it's still only one line of code (not counting the import statements and defining n):
from random import choice
from string import ascii_lowercase
n = 10
string_val = "".join(choice(ascii_lowercase) f...
How do I seed a random class to avoid getting duplicate random values [duplicate]
...
You should not create a new Random instance in a loop. Try something like:
var rnd = new Random();
for(int i = 0; i < 100; ++i)
Console.WriteLine(rnd.Next(1, 100));
The sequence of random numbers generated by a single Random instance is supposed ...
What are the differences between Generics in C# and Java… and Templates in C++? [closed]
...l that it contains Person objects (so you get intellisense and so on).
The downside of this is that old C# 1.0 and 1.1 code (before they added generics) doesn't understand these new List<something>, so you have to manually convert things back to plain old List to interoperate with them. This i...
How do I catch an Ajax query post error?
...e the deferred objects mechanism:
$.post('some.php', {name: 'John'})
.done(function(msg){ })
.fail(function(xhr, status, error) {
// error handling
});
Another way is using .ajax:
$.ajax({
type: "POST",
url: "some.php",
data: "name=John&location=Boston",
success:...
I get exception when using Thread.sleep(x) or wait()
...ough exception handling, threading and thread interruptions. But this will do what you want:
try {
Thread.sleep(1000); //1000 milliseconds is one second.
} catch(InterruptedException ex) {
Thread.currentThread().interrupt();
}
...
Determine if variable is defined in Python [duplicate]
How do you know whether a variable has been set at a particular place in the code at runtime? This is not always obvious because (1) the variable could be conditionally set, and (2) the variable could be conditionally deleted. I'm looking for something like defined() in Perl or isset() in PHP or...
How to create and use resources in .NET
How do I create a resource that I can reference and use in various parts of my program easily?
3 Answers
...