create a new Fold sequencing the effects of 2 Folds
Monoid for Folds, where effects are sequenced
Create a Fold from a side-effecting function
Create a Fold from a Reducer
Create a Fold from a Reducer and a last action
Create a Fold from a Sink with no accumulation
Transform a simple sink where the written value doesn't depend on the current state into a sink where the current state is passed all the time (and actually ignored) Create a Fold a State function
Run a Fold an let it perform a last action with the accumulated state
Run a fold an return the last value
Run a list of Folds, sequenced with the Fold Monoid
create a fold sink to output lines to a file
Unit Fold with no side-effect or accumulation
Unit fold function
This Sink doesn't do anything It can be used to build a Fold that does accumulation only
Fold functions and typeclasses