Friday, February 22, 2008

OpenLaszlo 4.0.10 released

OpenLaszlo 4.0.10 is released today. It seems to contain a lot of bug fixed (compared with 4.0.9). This version is getting closer to 4.1, which will be the production version that supports DHTML runtime.

I'm really looking forward to use 4.1, but now it's time to upgrade one of my production application to use 4.0.10.


Saturday, February 09, 2008

Grails Popularity Indicator?

Just got this nabble link from Graeme's blog. It's sure to show how much popularity of Grails to date.

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Tuesday, February 05, 2008

Matrix computation environment over Hadoop/HBase

I've been forming up the Hama project with Edward Yoon.
He's been doing the really great job of getting matrix computation work over Map/Reduce pattern. Now we are planning to have a MATLAB-like environment for them.
Here's a number of issues:

- The language needs to support lazy evaluation,
for re-arragement of a numerical expression to properly pick the right algorithm before computation.

I love Groovy, so it's time to develop the Groovy-derived langauge that suites numerical computing.

- Support BigDecimal, BigInteger by default.
Yep, we're again looking on large-scale computation, and sometime it's beyond the integer's boundary.
So we need the built-in support for these kinds of data type.

- Matrix and Vector to be the first class elements. For example,

def a = [1 2 3] // this is going to be a Vector
def b = [1 2 3; 4 5 6; 7 8 9] // this is going to be a matrix


def a = [1, 2, 3] // this is going to be an ArrayList
def a = [a:"a"] // this is going to be a HashMap

- Java integration in the same spirit as Groovy
So it should compile to bytecode.
Compile code will be exactly Java class, not like e.g., JRuby compile .class, in which contains a lot of specific magic

- Support Closure
An anonymous closure will be inlined, whilst a normal closure will be encoded as an inner class.

More to come ...