вівторок, 13 січня 2015 р.

VirtualJUG: meetup with James Gosling

Java and the Wave Glider with James Gosling

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  • 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
    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)

пʼятниця, 9 січня 2015 р.

#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