大约有 36,010 项符合查询结果（耗时：0.0395秒） [XML]
How can I add a column that doesn't allow nulls in a Postgresql database?
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Nice solution. I couldn't get to the online postgres docs for some reason to see what the syntax would be for this.
– Sean Bright
Feb 4 '09 at 17:48
4
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TypeScript or JavaScript type casting
How does one handle type casting in TypeScript or Javascript?
3 Answers
3
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The breakpoint will not currently be hit. No symbols have been loaded for this document in a Silverl
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This worked but I had to do it a few times (VS 2010, built-in webserver, website)
– MGOwen
Jan 24 '12 at 9:18
17
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DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
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This is what postgres does when a query produces an error and you try to run another query without first rolling back the transaction. (You might think of it as a safety feature, to keep you from corrupting your data.)
To fix this, you'll want t...
Numpy: Get random set of rows from 2D array
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>>> A = np.random.randint(5, size=(10,3))
>>> A
array([[1, 3, 0],
[3, 2, 0],
[0, 2, 1],
[1, 1, 4],
[3, 2, 2],
[0, 1, 0],
[1, 3, 1],
[0, 4, 1],
[2, 4, 2],
[3, 3, 1]])
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form_for but to post to a different action
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I dont think url_for is necessary. Also since controller is the same, you could use form_for @user, :url => :action => 'myaction'
– rubyprince
Mar 16 '11 at 3:32
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Left Align Cells in UICollectionView
...dths on a line. According to:
https://developer.apple.com/library/content/documentation/WindowsViews/Conceptual/CollectionViewPGforIOS/UsingtheFlowLayout/UsingtheFlowLayout.html
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Two way/reverse map [duplicate]
I'm doing this switchboard thing in python where I need to keep track of who's talking to whom, so if Alice --> Bob, then that implies that Bob --> Alice.
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how to get request path with express req object
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I think its got something to do with the positioning of middleware, but you are correct, it doesn't make sense.
– Menztrual
Sep 22 '12 at 5:55
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...code I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What makes debugging this problem very difficult is the ...