大约有 44,000 项符合查询结果（耗时：0.0527秒） [XML]
Computed / calculated / virtual / derived columns in PostgreSQL
...
The functionality is in development right now: commitfest.postgresql.org/16/1443
– r90t
Jan 23 '18 at 12:42
1
...
Why are Standard iterator ranges [begin, end) instead of [begin, end]?
... loop iterating over an array of size N is "for(i=0;i<N;i++) a[i]=0;". Now, you can't express that directly with iterators - many folks wasted time trying to make < meaningful. But it is almost equally obvious to say "for(i=0;i!=N;i++)..." Mapping 0 to begin and N to end is therefore conven...
What is the worst gotcha in C# or .NET? [closed]
...pect, that would probably have been a good idea, but I think it's too late now. It might also have looked like I was just trying to get more rep...
– Jon Skeet
Oct 28 '08 at 6:20
1...
How to get a variable name as a string in PHP?
...
Actually now that I've tested my code, my code always returned 'var' because it's being used in the function. When I use $GLOBALS instead, it returns the correct variable name for some reason. So I'll change the above code to use $GLO...
Non greedy (reluctant) regex matching in sed?
... Holy smokes I can't believe that worked :-) Only thing that sucks is now my script has a Perl dependency :-( On the plus side, virtually every Linux distro has Perl already so probably not an issue :-)
– Freedom_Ben
Sep 20 '14 at 16:15
...
How to pinch out in iOS simulator when map view is only a portion of the screen?
... right using two fingers from each hand but I have it working like a charm now.
– Christopher
Jul 25 '12 at 22:07
Glad...
API pagination best practices
...description it sounds like they would be added to the end (if not, let me know and I'll see if I can improve on this).
share
|
improve this answer
|
follow
|
...
Is it a good idea to index datetime field in mysql?
...it in conditions frequently in queries. If your only condition is BETWEEN NOW() AND DATE_ADD(NOW(), INTERVAL 30 DAY) and you have no other index in the condition, MySQL will have to do a full table scan on every query. I'm not sure how many rows are generated in 30 days, but as long as it's less t...
AngularJS : Where to use promises?
...kes the success callback regardless of the result of the FB.api method.
Now imagine that you're trying to code a robust sequence of three or more asynchronous operations, in a way that properly handles errors at each step and will be legible to anyone else or even to you after a few weeks. Possi...
How to mount a host directory in a Docker container
...x.
According to Docker documentation, the appropriate command to mount is now mount instead of -v. Here's its documentation:
--mount: Consists of multiple key-value pairs, separated by commas. Each key/value pair takes the form of a <key>=<value> tuple. The --mount syntax is more verb...