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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
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+100
Edit: This is a more complete version that shows more differences between [ (aka test) and [[.
The following table shows that whethe...
Center image in table td in CSS
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ScottScott
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23
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Can I use Objective-C blocks as properties?
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307
@property (nonatomic, copy) void (^simpleBlock)(void);
@property (nonatomic, copy) BOOL (^block...
Add line break within tooltips
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Just use the entity code 
 for a linebreak in a title attribute.
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Vagrant stuck connection timeout retrying
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rubo77
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answered Mar 22 '14 at 8:33
KieeKiee
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Case insensitive searching in Oracle
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Since 10gR2, Oracle allows to fine-tune the behaviour of string comparisons by setting the NLS_COMP and NLS_SORT session parameters:
SQL> SET HEADING OFF
SQL> SELECT *
2 FROM NLS_SESSION_PARAMETERS
3 WHERE PARAMETER IN ...
编译失败！ Error: Your build failed due to an error in the AAPT stage,...
... <activity> attribute name has invalid character
[java] /tmp/1685410160630_0.39828964915976717-0/youngandroidproject/../build/AndroidManifest.xml:5: Tag <activity> attribute name has invalid character '�'.
[java] May 30, 2023 9:29:27 AM com.google.appinvento...
Compare a string using sh shell
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edited May 5 '15 at 21:08
the Tin Man
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Why should text files end with a newline?
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Because that’s how the POSIX standard defines a line:
3.206 Line
A sequence of zero or more non- <newline> characters plus a terminating <newline> character.
Therefore, lines not ending in a newline character aren't considered actual lines. That's why some progra...
How to do a JUnit assert on a message in a logger
...og = appender.getLog();
final LoggingEvent firstLogEntry = log.get(0);
assertThat(firstLogEntry.getLevel(), is(Level.INFO));
assertThat((String) firstLogEntry.getMessage(), is("Test"));
assertThat(firstLogEntry.getLoggerName(), is("MyTest"));
}
}
class TestAppend...