In some cases, the default implementations are very inefficient (e.g. Map.replaceAll and forEach fetching all entries and iterating over them locally). This was improved on member-side as the cluster version is available and in some cases we opted for using entry processors instead.

On the client-side, the cluster version is not available which meant it ends up still using the default versi

Unlike N-Gram, the current Skip-Gram tokenizer does not allow variable length tokens. This ticket is to implement a min max scheme similar to the N-Gram tokenizer such that each token is a k-skip-n-gram. In other words, instead of fi

Introduction
There is a discussion regarding to purity estimation - see #620 . In order to cover this proposal, V-Measure should be implemented.

References
Article: V-Measure: A conditional entropy-based external cluster evaluation measure. Andrew Rosenberg and Julia Hirschberg.

Description
The functionality should be implemented for Python and C++ version. The following names