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import { equals } from './equals.js'
export function dropRepeatsBy(fn, list){  if (arguments.length === 1) return _list => dropRepeatsBy(fn, _list)
  let lastEvaluated = null
  return list.slice().filter(item => {    if (lastEvaluated === null){      lastEvaluated = fn(item)
      return true    }    const evaluatedResult = fn(item)    if (equals(lastEvaluated, evaluatedResult)) return false
    lastEvaluated = evaluatedResult
    return true  })}