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What does -D_XOPEN_SOURCE do/mean?
...nclude definitions for some extra functions that are defined in the X/Open and POSIX standards.
This will give you some extra functionality that exists on most recent UNIX/BSD/Linux systems, but probably doesn't exist on other systems such as Windows.
The numbers refer to different versions of the...
How to write log to file
...The safer permissions are 0644 or even 0664 to allow user read/write, user and group read/write, and in both cases disallow everyone write.
– Jonathan
Jun 10 '16 at 16:22
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The selected run destination is not valid for this action
...MyApp My Mac 64-bit". How can I get this set back to iphone/ipad simulator and devices? My "Targeted Device Family" setting is iPhone/iPad.
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Programmer-friendly search engine? [closed]
...gle is unfriendly to searching for verbatim strings with characters like $ and #. Is there a search engine that supports searching for verbatim strings?
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SQL Server - SELECT FROM stored procedure
... what if, we need to send parameters to mulple stored procedures and combine them into one one big stored procedure? Can view, take parameters, like stored procedures does
– mrN
Aug 18 '11 at 7:14
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How do I schedule jobs in Jenkins?
...e 15th minute of the 13th hour of the day.
Jenkins used a cron expression, and the different fields are:
MINUTES Minutes in one hour (0-59)
HOURS Hours in one day (0-23)
DAYMONTH Day in a month (1-31)
MONTH Month in a year (1-12)
DAYWEEK Day of the week (0-7) where 0 and 7 are sunday
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Java, Simplified check if int array contains int
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ArrayUtils is a thing of past. Java 8+ and Guava have pretty amazing goodies!!
– TriCore
May 13 '17 at 23:41
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How to strike through obliquely with css
...with a CSS transform. Doing it this way adds no extra elements to the DOM, and adding/removing the strikethrough is a simple as adding/removing the class.
Here's a demo
Caveats
This will only work down to IE8. IE7 does not support :before, however will degrade gracefully in browsers that do supp...
Start ssh-agent on login
... is especially nice since it will see if you've already started ssh-agent and, if it can't find it, will start it up and store the settings so that they'll be usable the next time you start up a shell.
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How to get the number of days of difference between two dates on mysql?
... expr2
expressed as a value in days from one
date to the other. expr1 and expr2
are date or date-and-time expressions.
Only the date parts of the values are
used in the calculation
In your case, you'd use :
mysql> select datediff('2010-04-15', '2010-04-12');
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