大约有 40,000 项符合查询结果（耗时：0.0721秒） [XML]
Adding 'serial' to existing column in Postgres
...urn foo into bar
CREATE SEQUENCE foo_a_seq;
ALTER TABLE foo ALTER COLUMN a SET DEFAULT nextval('foo_a_seq');
ALTER TABLE foo ALTER COLUMN a SET NOT NULL;
ALTER SEQUENCE foo_a_seq OWNED BY foo.a; -- 8.2 or later
SELECT MAX(a) FROM foo;
SELECT setval('foo_a_seq', 5); -- replace 5 by SELECT MAX re...
Difference between CouchDB and Couchbase
... editor after snippets, if snippets enabled
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Detect changed input text box
... but for some reason it's not working... I get no console errors. When I set a breakpoint in the browser at the change() function it never hits it.
...
Rails :dependent => :destroy VS :dependent => :delete_all
...ng their :destroy method
:nullify All associated objects' foreign keys are set to NULL without calling their save callbacks
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Peak-finding algorithm for Python/SciPy
...We can see that the width parameter is not very useful here because if you set a minimum width too high, then it won't be able to track very close peaks in the high frequency part. If you set width too low, you would have many unwanted peaks in the left part of the signal. Same problem with distance...
How do you query for “is not null” in Mongo?
...x only exist when there is something in the field). Here is a sample data set:
db.foo.find()
{ "_id" : ObjectId("544540b31b5cf91c4893eb94"), "imageUrl" : "http://example.com/foo.jpg" }
{ "_id" : ObjectId("544540ba1b5cf91c4893eb95"), "imageUrl" : "http://example.com/bar.jpg" }
{ "_id" : ObjectId("5...
Specify pane percentage in tmuxinator project
...d be specified in the layout: line. But you are not limited to the five preset layouts (such as main-vertical). From the man page:
In addition, select-layout may be used to apply a previously used layout -
the list-windows command displays the layout of each window in a form
suitable for use with...
Is there any async equivalent of Process.Start?
... true
};
process.Exited += (sender, args) =>
{
tcs.SetResult(process.ExitCode);
process.Dispose();
};
process.Start();
return tcs.Task;
}
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Search text in fields in every table of a MySQL database
... @Dan Rather's answer helped too, because the db I was looking through was setup obscurely and I couldn't figure out what the column name or table would be for sure just by looking...
– DrCord
Jan 1 '14 at 19:14
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Get the cartesian product of a series of lists?
How can I get the Cartesian product (every possible combination of values) from a group of lists?
13 Answers
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