大约有 20,000 项符合查询结果（耗时：0.0518秒） [XML]
Create Generic method constraining T to an Enum
...write a HasAnyFlags<T>(this T it, T other) extension method that was orders of magnitude faster than Enum.HasFlag(Enum) and which type-checked its arguments.
– supercat
Apr 12 '13 at 16:27
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What is the purpose of willSet and didSet in Swift?
...ws conditional setting of an actual stored property
//True model data
var _test : Int = 0
var test : Int {
get {
return _test
}
set (aNewValue) {
//I've contrived some condition on which this property can be set
if (aNewValue != test) {
_test = aNewV...
apache redirect from non www to www
...put www. in the ServerAlias using the *. wildcard. Because I messed up the ordering of the VirtualHost entries, the *. wildcard had the opportunity to match when I didn't think it would.
– dmiller309
May 10 '14 at 21:28
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List comprehension on a nested list?
... Super useful! Makes it clear that loops (top-to-bottom) are ordered left to right in the generator. This not obvious since in (f(x) for x in l) places the second line of the for-loop equivalent on the left.
– user48956
Jan 11 '18 at 18:11
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Is there any way to kill a Thread?
...you can afford it (if you are managing your own threads) is to have an exit_request flag that each threads checks on regular interval to see if it is time for it to exit.
For example:
import threading
class StoppableThread(threading.Thread):
"""Thread class with a stop() method. The thread it...
How to avoid long nesting of asynchronous functions in Node.js
... look at flow-js, step and async and it seems that they only deal with the order of function execution. In my case there is access to inline closure variables in every indentation. So for example the functions work like this: get HTTP req/res, get userid from DB for cookie, get email for the later u...
What is context in _.each(list, iterator, [context])?
I am new to underscore.js. What is the purpose of [context] in _.each() ? How should it be used?
5 Answers
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Cannot kill Python script with Ctrl-C
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Looks like in python3 you can pass daemon=True to Thread.__init__
– Ryan Haining
Aug 14 '18 at 0:57
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show 3 more comments...
Extract substring in Bash
Given a filename in the form someletters_12345_moreleters.ext , I want to extract the 5 digits and put them into a variable.
...
Get all related Django model objects
...his gives you the property names for all related objects:
links = [rel.get_accessor_name() for rel in a._meta.get_all_related_objects()]
You can then use something like this to get all related objects:
for link in links:
objects = getattr(a, link).all()
for object in objects:
# d...