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How to find difference between two Joda-Time DateTimes in minutes
...ou the difference between two DateTime objects in milliseconds:
DateTime d1 = new DateTime();
DateTime d2 = new DateTime();
long diffInMillis = d2.getMillis() - d1.getMillis();
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How add context menu item to Windows Explorer for folders [closed]
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In the registration editor (regedit.exe) find:
Context menu for right click on folders in lef...
How to use JavaScript variables in jQuery selectors?
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edited Jun 25 '15 at 5:31
answered May 5 '11 at 2:10
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Rails: Why does find(id) raise an exception in rails? [duplicate]
If there is no user with an id of 1 in the database, trying User.find(1) will raise an exception.
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Regex how to match an optional character
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Use
[A-Z]?
to make the letter optional. {1} is redundant. (Of course you could also write [A-Z]{0,1} which would mean the same, but that's what the ? is there for.)
You could improve your regex to
^([0-9]{5})+\s+([A-Z]?)\s+([A-Z])([0-9]{3})([0-9]{3})([A-Z]{3})([A-...
How to check if a process id (PID) exists
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10 Answers
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Changing every value in a hash in Ruby
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11 Answers
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