大约有 40,000 项符合查询结果（耗时：0.0269秒） [XML]
Create PostgreSQL ROLE (user) if it doesn't exist
... with correct exception and sqlstate propagation:
DO $$
BEGIN
CREATE ROLE test;
EXCEPTION WHEN duplicate_object THEN RAISE NOTICE '%, skipping', SQLERRM USING ERRCODE = SQLSTATE;
END
$$;
Test output (called two times via DO and then directly):
$ sudo -u postgres psql
psql (9.6.12)
Type "help" fo...
How to check for a valid Base64 encoded string
...
I think you are on the right track. I did some testing and it seems it is multiples of 4 instead of 3.
– Chris Mullins
Jun 10 '11 at 17:24
1
...
Example invalid utf8 string?
I'm testing how some of my code handles bad data, and I need a few series of bytes that are invalid UTF-8.
5 Answers
...
window.close and self.close do not close the window in Chrome
... while ago, to stop various malicious exploits and annoyances.
From the latest working spec for window.close():
The close() method on Window objects should, if all the following conditions are met, close the browsing context A:
The corresponding browsing context A is script-closable.
...
How to verify that method was NOT called in Moq?
...n method - it will fail saying that the expectation was not met ; when the test should ideally pass.
– Gishu
Sep 30 '09 at 10:29
53
...
How to declare a friend assembly?
...tocol Buffers I use:
[assembly:InternalsVisibleTo("Google.ProtocolBuffers.Test,PublicKey="+
"00240000048000009400000006020000002400005253413100040000010001008179f2dd31a648"+
"2a2359dbe33e53701167a888e7c369a9ae3210b64f93861d8a7d286447e58bc167e3d99483beda"+
"72f738140072bb69990bc4f98a21365de2c105e848...
Select elements by attribute
...
Note that if you're testing for existence (presumably in an if statement, for example) it's probably more correct/reliable to do: if($(":checkbox[myattr]").length()>0)...
– rinogo
Aug 15 '11 at 21:18
...
How do I select the “last child” with a specific class name in CSS? [duplicate]
...iple classes to an element like so:
<ul>
<li class="list">test1</li>
<li class="list">test2</li>
<li class="list last">test3</li>
<li>test4</li>
</ul>
The last element has the list class like its siblings but also has the...
Circle line-segment collision detection algorithm?
...e ray,
L is the end point of the ray,
C is the center of sphere you're testing against
r is the radius of that sphere
Compute:
d = L - E ( Direction vector of ray, from start to end )
f = E - C ( Vector from center sphere to ray start )
Then the intersection is found by..
Plugging:
P = E ...
Remove the last three characters from a string
...
string test = "abcdxxx";
test = test.Remove(test.Length - 3);
//output : abcd
share
|
improve this answer
|
...