Fridays Fun

Java Zone 2014 Video

http://2014.javazone.no/program.html

VirtualJUG: meetup with James Gosling

Java and the Wave Glider with James Gosling

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• Thursday, January 22, 2015

  5:00 PM to 6:00 PM
• Needs a location

• This is a virtual Meetup occuring at 5PM UK time. For help with your timezone calculation, refer to this.

  You can tune in to the session at http://virtualJUG.com

  If all fails, you can still access YouTube and IRC via previous means:

  1) Join the IRC channel - Ask questions, chat, discuss 
  
  2) View the live stream on YouTube

  Java and the Wave Glider with James Gosling

  Abstract tba

  Speaker: James Gosling

  James Gosling is the founder of Java and CTO at Liquid Robotics. 

#tip #mongo #limit

Interesting thing with mongo quering
Do you know result of db.myCollection.find().limit(0)?
It will be the same to db.myCollection.find() and return everything from collection
What about such thing db.myCollection.find().limit(-12)? Will it work at all?
Yes It will return the same to db.myCollection.find().limit(+12)

#tip #java

If you are not 100% sure prefer String.valueOf(value) over new String(value).

Inside valueOf method we have check on null so that you'll never get NPE