JohnLangford/vowpal_wabbit — pull request #463 by martinpopel (2014-11-28 18:04:13+00:00)
Title: wap_ldf subtract_example should handle quadratic and cubic features

subtract_example should use GD::foreach_feature, so it handles also quadratic and cubic features

This was broken, now I have loss 0.16 instead of 0.30 on a dataset which uses shared features.