[jira] [Created] (SYSTEMML-751) Support functions as arguments

["Manoj Kumar (JIRA)" <ji...@apache.org>]

Manoj Kumar created SYSTEMML-751:
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             Summary: Support functions as arguments
                 Key: SYSTEMML-751
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-751
             Project: SystemML
          Issue Type: Wish
            Reporter: Manoj Kumar


Hi,

How difficult is it to support functions as arguments? (If not done already)

One real use-case would be to just implement a modular lbfgs, newton-cg etc as in (http://docs.scipy.org/doc/scipy/reference/generated/scipy.optimize.fmin.html#scipy.optimize.fmin)

I believe this lessens burden on code maintenance and brings in new users, because every time I implement a new algorithm, I just need to check that my function (and gradient) implementation is correct.

I ultimately would like to do this.

source("lbfgs.dml") as lbfgs

f = loss_function() {
}

w = lbfgs::optimize()



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