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How to add “on delete cascade” constraints?
...hy until you see "Constraints"), or you can query the information schema.
select *
from information_schema.key_column_usage
where position_in_unique_constraint is not null
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jquery find closest previous sibling with class
...first is working on a list of returned elements that starts closest to the selected object (as opposed to top to bottom relative to the page)?
– NReilingh
Mar 10 '13 at 0:41
2
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Unfortunately MyApp has stopped. How can I solve this?
.... Alternatively, you can press alt+6. Make sure your emulator or device is selected in the Devices panel. Next, try to find the stack trace, which is shown in red. There may be a lot of stuff logged into logcat, so you may need to scroll a bit. An easy way to find the stack trace is to clear the log...
How can I merge two hashes without overwritten duplicate keys in Ruby?
... and defaults without overwriting the destination hash, you may check with select if the key is already present in the destination hash. Here's the pure Ruby solution without Rails:
options = { "a" => 100, "b" => 200 }
defaults = { "b" => 254, "c" => 300 }
options.merge!(defaults.selec...
Stop Excel from automatically converting certain text values to dates
...qualifier if you have surrounded your values by quotes
In the third page, select every column individually and assign each the type "Text" instead of "General" to stop Excel from messing with your data.
Hope this helps you or someone with a similar problem!
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Dynamic SQL - EXEC(@SQL) versus EXEC SP_EXECUTESQL(@SQL)
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EXEC('SELECT * FROM FOO WHERE ID=?', 123) will replace the parameter placeholder "?" with the value 123 and then execute the query, returning a result for SELECT * FROM FOO WHERE ID=123
– Peter Wone
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Does the order of LINQ functions matter?
... order by ((record.Score1 + record.Score2) / 2) descending
select new
{
Name = record.Name,
Average = ((record.Score1 + record.Score2) / 2)
};
If, for whatever reason, you decided to "optimize" the ...
How to execute Python scripts in Windows?
...pplication to handle python files be python.exe.
right click a *.py file, select "Open With" dialog. In there select "python.exe" and check "always use this program for this file type" (something like that).
then your python files will always be run using python.exe
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One Activity and all other Fragments [closed]
...I used the single Activity approach and a Facebook style navigation. When selecting items from the navigation list I update a single Fragment container to display that section.
That said, having a single Activity also introduces a lot of complexities. Let's say you have an edit form, and for so...
What is a NullReferenceException, and how do I fix it?
... to find out where the reference is or isn't set, right-click its name and select "Find All References". You can then place a breakpoint at every found location and run your program with the debugger attached. Every time the debugger breaks on such a breakpoint, you need to determine whether you exp...