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Difference between null and empty (“”) Java String
... can still invoke methods or functions on it like
a.length()
a.substring(0, 1)
and so on.
If the String equals null, like b, Java would throw a NullPointerException if you tried invoking, say:
b.length()
If the difference you are wondering about is == versus equals, it's this:
== compares ...
git selective revert local changes from a file
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edited May 23 '17 at 12:02
Community♦
111 silver badge
answered Jul 10 '09 at 12:15
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How can I reliably get an object's address when operator& is overloaded?
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102
Update: in C++11, one may use std::addressof instead of boost::addressof.
Let us first copy ...
Get Image Height and Width as integer values?
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answered Feb 1 '10 at 18:39
SarfrazSarfraz
345k6868 gold badges500500 silver badges556556 bronze badges
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Easy way of running the same junit test over and over?
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30
With JUnit 5 I was able to solve this using the @RepeatedTest annotation:
@RepeatedTest(10)
pub...
How do I rename all folders and files to lowercase on Linux?
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answered Sep 30 '08 at 12:03
Alex BAlex B
73.5k3636 gold badges187187 silver badges270270 bronze badges
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history.replaceState() example?
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+50
Indeed this is a bug, although intentional for 2 years now.
The problem lies with some unclear specs and the complexity when document....
Programmatically add custom event in the iPhone Calendar
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Based on Apple Documentation, this has changed a bit as of iOS 6.0.
1) You should request access to the user's calendar via "requestAccessToEntityType:completion:" and execute the event handling inside of a block.
2) You need to commit your event now or pass the "commit" param to your sa...
Best Practices for securing a REST API / web service [closed]
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answered Aug 11 '08 at 8:45
Greg HewgillGreg Hewgill
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