大约有 44,000 项符合查询结果(耗时:0.0432秒) [XML]
Are soft deletes a good idea? [duplicate]
...cord showing up again, which might take some time. Also, it would be easy for a developer to omit the WHERE clause from COUNT(*) queries, which might take even longer to discover (I worked on one project where this had been happening for years; not many records were ever "deleted", so the totals we...
How do I get a value of a using jQuery?
... .text() with tspan and not .html(). Unsure why and it may not be the case for everyone but it fixed it in IE when I used .text().
– Kalel Wade
Aug 20 '14 at 18:57
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Remove Fragment Page from ViewPager in Android
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The solution by Louth was not enough to get things working for me, as the existing fragments were not getting destroyed. Motivated by this answer, I found that the solution is to override the getItemId(int position) method of FragmentPagerAdapter to give a new unique ID whenever ther...
Original purpose of ? [closed]
... to maintain a kind of a state.
Precisely. In fact, it's still being used for this purpose today because HTTP as we know it today is still, at least fundamentally, a stateless protocol.
This use case was actually first described in HTML 3.2 (I'm surprised HTML 2.0 didn't include such a description)...
Customizing the template within a Directive
I have a form that is using markup from Bootstrap, like the following:
4 Answers
4
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How to select the row with the maximum value in each group
In a dataset with multiple observations for each subject I want to take a subset with only the maximum data value for each record. For example, with a following dataset:
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Get selected value in dropdown list using JavaScript
...Netscape Navigator needed to be accommodated, so an equally ancient method for accessing the value of a single select was used. But I'm just guessing about that. ;-)
– RobG
Jan 18 '15 at 4:06
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How do you use the ellipsis slicing syntax in Python?
...builtin class or Python language constuct makes use of it.
So the syntax for it depends entirely on you, or someone else, having written code to understand it.
Numpy uses it, as stated in the documentation. Some examples here.
In your own class, you'd use it like this:
>>> class TestEl...
How to get key names from JSON using jq
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You need to use jq 'keys[]'. For example:
echo '{"example1" : 1, "example2" : 2, "example3" : 3}' | jq 'keys[]'
Will output a line separated list:
"example1"
"example2"
"example3"
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How do you truncate all tables in a database using TSQL?
I have a test environment for a database that I want to reload with new data at the start of a testing cycle. I am not interested in rebuilding the entire database- just simply "re-setting" the data.
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