大约有 2,200 项符合查询结果（耗时：0.0134秒） [XML]
“open/close” SqlConnection or keep open?
...at least ;) Opening and closing costs time.
– David Mårtensson
Dec 14 '10 at 13:11
8
@David Mart...
I can’t find the Android keytool
... In C:\Program Files\Java\jdk1.7.0_79\bin
– Jean-François
Apr 13 '16 at 5:11
19
Mine was in C:\P...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
In multiple courses, books, and jobs, I have seen text fields defined as VARCHAR(255) as kind of the default for "shortish" text. Is there any good reason that a length of 255 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a go...
Compression/Decompression string with C#
...ut only for UTF8-based things. If you add in, say, Swedish characters like åäö to the string value you're serialize/deserializing it will fail a round-trip test :/
– bc3tech
Aug 21 '19 at 12:32
...
How to remove unused C/C++ symbols with GCC and ld?
...
if symbols are not stripped away, ça va sans dire—but it seems it needed to be said now.
– ShinTakezou
Feb 23 '16 at 18:52
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plot a circle with pyplot
... If so, could you provide an example, please ?
– François M.
Sep 20 '17 at 16:08
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How do I use pagination with Django class based generic ListViews?
..._data()
df = pd.DataFrame(list(self.model.objects.all().values()))
ipc = df.groupby('ip')['ip'].count().sort_values(ascending=False)
urlc = df.groupby('url')['url'].count().sort_values(ascending=False).to_dict()
ipc = tuple(ipc.to_dict().items())
urlc = tuple(urlc.items())
...
Can TCP and UDP sockets use the same port?
...ing connections on the original socket whilst simultaneously servicing multiple clients each of which will be triggering receive events on their own sockets.
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Is SHA-1 secure for password storage?
...r will not even notice that it took 10ms to hash his password, instead of 1µs; but the cost for the attacker has risen by a very noticeable factor 10000. On shared servers with thousands of clients per second, the aggregate cost may become prohibitive. Conceptually, raising the bar by the same fact...
Google Chrome redirecting localhost to https
...ssing "CTRL + SHIFT + R" for a hard reload.
– LP. Gonçalves
Jul 11 '18 at 14:20
On chromium, it is F12 and not CTRL+S...