1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
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  })}