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How to find difference between two Joda-Time DateTimes in minutes
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Does the above take into account time zones? Or should I convert to UTC / GMT first?
– Doo Dah
Apr 21 '16 at 1:15
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What is the !! (not not) operator in JavaScript?
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Converts Object to boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, true.
!oObject // inverted boolean
!!oObject // non inverted boolean so true boolean representation
So !! is not a...
upstream sent too big header while reading response header from upstream
... message: PHP Notice: Undefined index: Firstname in /srv/www/classes/data_convert.php on line 1090
PHP message: PHP Notice: Undefined index: Lastname in /srv/www/classes/data_convert.php on line 1090
... // 20 lines of same
PHP message: PHP Notice: Undefined index: Firstname in /srv/www/classes/d...
Graphviz: How to go from .dot to a graph?
...dot file, which is valid according to the syntax. How do I use graphviz to convert this into an image?
11 Answers
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In log4j, does checking isDebugEnabled before logging improve performance?
...emperature set to {}. Old temperature was {}.", t, oldT);
This will only convert the passed in parameters to strings if debug is enabled. SLF4J as its name suggests is only a facade and the logging calls can be passed to log4j.
You could also very easily "roll your own" version of this.
Hope thi...
How to format a java.sql Timestamp for displaying?
...he best answer, according to me. No superfluous object is created just for converting the timestamp to a string.
– Salil
May 25 '13 at 3:33
1
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Optional Parameters with C++ Macros
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You could get a clear compilation error if you converted the selected argument which is supposed to be a MACRO name to string using # (the pound sign) and compared it's first n characters with the expected prefix and if there is no match, printed an informative error.
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How do you clear the SQL Server transaction log?
... awful).
DECLARE @path NVARCHAR(255) = N'\\backup_share\log\testdb_'
+ CONVERT(CHAR(8), GETDATE(), 112) + '_'
+ REPLACE(CONVERT(CHAR(8), GETDATE(), 108),':','')
+ '.trn';
BACKUP LOG foo TO DISK = @path WITH INIT, COMPRESSION;
Note that \\backup_share\ should be on a different machine that...
How do you round to 1 decimal place in Javascript?
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// fixed is always to 1 d.p.
// NOTE: .toFixed() returns a string!
// To convert back to number format
parseFloat(number.toFixed(2))
// 12.34
// but that will not retain any trailing zeros
// So, just make sure it is the last step before output,
// and use a number format during calculations!
E...
What are the advantages of using nullptr?
...ic value whereas null pointer constants do not. A null pointer constant is converted to the null pointer of that type (whatever that is). It is required that two null pointers of the same type compare identically, and boolean conversion turns a null pointer into false. Nothing else is required. Ther...