Ramda merge (concat) multiple lists

In notebook:
Work Notes
Created at:
2019-01-10
Updated:
2019-01-11
Tags: 
  const mergelists = R.unapply(R.reduce(R.concat, []))

For example when using with the converge method to merge the results:

  const megalist =  R.converge(
  R.unapply(R.reduce(R.concat, [])), 
  [R.identity, R.identity, R.identity])
  
megalist([1]) // [1,1,1]

source: stack overflow