大约有 30,000 项符合查询结果（耗时：0.0406秒） [XML]
C# version of java's synchronized keyword?
...e are talking about instance methods. Using static means that if thread 1 calls instance1.DoSomething() and thread 2 calls instance2.DoSomething, the second call will block even though it is a completely different object. thread2's call shouldn't block unless someone is calling DoSomething on the ...
Multi-statement Table Valued Function vs Inline Table Valued Function
...tionally equivalent. The MSTV function does an extra query each time it is called and, most importantly, filters on the customer id. In a large query, the optimizer would not be able to take advantage of other types of joins as it would need to call the function for each customerId passed. However, ...
deleting rows in numpy array
... Thanks! I had the same problem, and I could not figure out why simply calling numpy.delete(x, index) didn't work.
– Antimony
Nov 20 '15 at 22:59
6
...
Bash: Copy named files recursively, preserving folder structure
...
Call it old-school, call it portable, call it whatever, but I definitely trust cpio for this task. I do agree that the -print0 and -null options should be used, otherwise, at some point, someone will give you some folders wit...
How do I run all Python unit tests in a directory?
...nit test module is of the form test_*.py . I am attempting to make a file called all_test.py that will, you guessed it, run all files in the aforementioned test form and return the result. I have tried two methods so far; both have failed. I will show the two methods, and I hope someone out there...
Should accessing SharedPreferences be done off the UI Thread?
...areful of lifecycle transitions). You can use reflection to conditionally call apply() on GB+ and commit() on Froyo or below. I'll be doing a blogpost with sample code of how to do this.
Regarding loading, though...
once loaded, SharedPreferences are singletons and cached process-wide. so you...
How do I use IValidatableObject?
... The problem with this solution is that now you depend on the caller for your object to be properly validated.
– cocogza
Feb 28 '17 at 22:06
...
Renaming table in rails
...
You would typically do this sort of thing in a migration:
class RenameFoo < ActiveRecord::Migration
def self.up
rename_table :foo, :bar
end
def self.down
rename_table :bar, :foo
end
end
...
Break parallel.foreach?
...
@Hendrik Wiese: Docs say: Calling the Break method informs the for operation that iterations after the current one don't have to execute. However, all iterations before the current one will still have to be executed if they haven't already. and there ...
Does const mean thread-safe in C++11?
...te involved is necessary for a data race to occur. That means that you can call area from as many threads as you want and you will get correct results all the time.
Note that this doesn't mean that rect is thread-safe. In fact, its easy to see how if a call to area were to happen at the same time th...