大约有 48,000 项符合查询结果（耗时：0.0755秒） [XML]
Primary key or Unique index?
...1 (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 into this column for a second time.
In MySQL a unique ...
How to capitalize the first letter of word in a string using Java?
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546
If you only want to capitalize the first letter of a string named input and leave the rest alon...
How to show changed file name only with git log? [duplicate]
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answered Jan 9 '13 at 2:40
fannheywardfannheyward
14.8k99 gold badges5858 silver badges9595 bronze badges
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Android on-screen keyboard auto popping up
... to show :(
– Nate
Aug 20 '11 at 22:47
This worked for me. I'm running Android 2.3.4, and developing using <uses-sd...
Assign variable in if condition statement, good practice or not? [closed]
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Matthew CrumleyMatthew Crumley
90.6k2424 gold badges101101 silver badges124124 bronze badges
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Access restriction: The type 'Application' is not API (restriction on required library rt.jar)
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Torsten
1,03211 gold badge1414 silver badges3535 bronze badges
answered Mar 29 '15 at 12:42
Christian HujerChristian Hujer
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What is the difference between MOV and LEA?
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174
LEA means Load Effective Address
MOV means Load Value
In short, LEA loads a pointer to the it...
What does the leading semicolon in JavaScript libraries do?
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140
It allows you to safely concatenate several JavaScript files into one, to serve it quicker as o...
How to trigger event in JavaScript?
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461
You can use fireEvent on IE 8 or lower, and W3C's dispatchEvent on most other browsers. To cre...