Comments on Jonhnny Weslley / My blog: SHadoop

As an extension of this idea, take a look at Scala...

2010-07-19T05:18:34.256-03:00

As an extension of this idea, take a look at ScalaHadoop here.

Hi Murray, The '_ <: A' is a generic wildcard in ...

2010-05-24T22:02:56.710-03:00

Hi Murray,

The '_ <: A' is a generic wildcard in scala. This indicates the any subclass of A will be accepted. This is similar to '? extends A' from Java. In this case, the above line notifies the conf object that the job's output format is based on text (TextOutputFormat) which takes a pair of generic parameters types. The first parameter type must be a subclass of WritableComparable, while the second one must be a subclass of Writable.

Could you explain the line: conf setOutputFor...

2010-05-24T18:35:18.139-03:00

Could you explain the line:

conf setOutputFormat classOf[TextOutputFormat[_ <: WritableComparable, _ <: Writable]]

For instance, what is the _ <: stand for?

Nice.

2010-01-01T22:17:26.560-03:00

Nice.

Good stuff.

2009-12-04T16:39:43.548-03:00

Good stuff.

This post dramatically illustrates why, after prog...

2009-02-18T16:37:00.000-03:00

This post dramatically illustrates why, after programming Java for a long time, I've recently become a Scala convert.

Nice article!

Very interesting post! It highlights Scala's conci...

2008-05-17T13:18:00.000-03:00

Very interesting post! It highlights Scala's concise syntax!