大约有 42,000 项符合查询结果（耗时：0.0660秒） [XML]
Primary key or Unique index?
...ble1 (foo, bar) VALUES (2, 2); -- OK
INSERT INTO table1 (foo, bar) VALUES (3, 1); -- OK
INSERT INTO table1 (foo, bar) VALUES (1, 4); -- Fails!
Duplicate entry '1' for key 'ux_table1_foo'
The last insert fails because it violates the unique index on column foo when it tries to insert the value 1 i...
Adjust UILabel height depending on the text
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34 Answers
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How to discover number of *logical* cores on Mac OS X?
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answered Nov 11 '09 at 14:43
jkpjkp
66.8k2323 gold badges9797 silver badges102102 bronze badges
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How to determine device screen size category (small, normal, large, xlarge) using code?
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Pang
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answered Feb 16 '11 at 12:20
Jeff GilfeltJeff Gilfelt
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Is there a built in function for string natural sort?
Using Python 3.x, I have a list of strings for which I would like to perform a natural alphabetical sort.
18 Answers
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How do you use an identity file with rsync?
...val $(ssh-agent) # Create agent and environment variables
ssh-add ~/.ssh/1234-identity
ssh-agent is a user daemon which holds unencrypted ssh keys in memory. ssh finds it based on environment variables which ssh-agent outputs when run. Using eval to evaluate this output creates the environment v...
Choosing a Windows automation scripting language. AutoIt vs Autohotkey [closed]
...ered Nov 29 '09 at 10:49
user147374user147374
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How to write an inline IF statement in JavaScript?
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13 Answers
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Best way to parse command line arguments in C#? [closed]
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324
votes
I would strongly suggest using NDesk.Options (Documentation) and/or Mono.Op...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...uration file.
Create a text file ~/Library/Application Support/VisualVM/1.3.6/etc/visualvm.conf (replace 1.3.6 with whatever version of VisualVM you're using) containing the line
visualvm_jdkhome="`/usr/libexec/java_home -v '1.7*'`"
and this will force it to choose Java 7 instead of 8.
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