大约有 800 项符合查询结果（耗时：0.0247秒） [XML]
How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
...rmed
[self performSelector:@selector(setHidden:) withObject:nil afterDelay:5.0];
//self will be cast to YES when the selector is performed
[self performSelector:@selector(setHidden:) withObject:self afterDelay:10.0];
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How do I add indices to MySQL tables?
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Use SHOW INDEXES FROM YOURTABLE dev.mysql.com/doc/refman/5.0/en/show-index.html to check if the indexes have been added
– Timo Huovinen
Jun 7 '13 at 12:28
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Count the number of occurrences of a string in a VARCHAR field?
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This is the mysql function using the space technique (tested with mysql 5.0 + 5.5):
CREATE FUNCTION count_str( haystack TEXT, needle VARCHAR(32))
RETURNS INTEGER DETERMINISTIC
RETURN LENGTH(haystack) - LENGTH( REPLACE ( haystack, needle, space(char_length(needle)-1)) );
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Removing a list of characters in string
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2.7.5 (default, Mar 9 2014, 22:15:05)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)]
"plain" string:
0.637 remove_chars_iter
0.649 remove_chars_re
0.010 remove_chars_translate_bytes
unicode string:
0.866 remove_chars_iter
0.680 remove_chars_re_unicode
1.373 remove_chars_translate_uni...
Android java.lang.VerifyError?
...is my code declare a CameraAccessException, which is introduced at Android 5.0, but when I run in an Android 4.3 device, the VerifyError is thrown.
– Piasy
Aug 3 '16 at 9:48
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EF Migrations: Rollback last applied migration?
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As of EF 5.0, the approach you describe is the preferred way. So
PM> Update-Database -TargetMigration:"NameOfSecondToLastMigration"
or using your example migrations
PM> Update-Database -TargetMigration:"CategoryIdIsLong"
One...
Android and in TextView
...ick for me. It doesn't make a space, just joins the words - Android 4.4.4, 5.0, 5.1
– Marcel Bro
Oct 6 '15 at 15:14
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How can I apply a border only inside a table?
...rder: 1px solid black;
}
view example ...
tested in FF 3.6 and Chromium 5.0, IE lacks support; from W3C:
Borders with the 'border-style' of 'hidden' take precedence over all other conflicting borders. Any border with this value suppresses all borders at this location.
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How do I run a Java program from the command line on Windows?
...among the files.
C:\mywork> set path=%path%;C:\Program Files\Java\jdk1.5.0_09\bin
This tells the system where to find JDK programs.
C:\mywork> javac filenamehere.java
This runs javac.exe, the compiler. You should see nothing but the
next system prompt...
C:\mywork> dir
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How do I check if an index exists on a table field in MySQL?
... so:
SHOW INDEX FROM [tablename]
Docs: https://dev.mysql.com/doc/refman/5.0/en/show-index.html
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