text: import { decoLog }               from '@spare/deco'
  import { logger, logNeL }        from '@spare/logger'
  import { copyMargin, mapMargin } from '../../../index'
  
  let ar = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  
  const alpha = copyMargin(ar, 4, 3)
  alpha |> decoLog
  
  alpha.map(x => (x << 2)) |> logger
  alpha.map(x => x + '+') |> logNeL
  
  const beta = mapMargin(ar, x => [x, x], 4, 3)
  beta |> decoLog
  
  beta.forEach(v => v.splice(1, 1, 0))
  beta |> decoLog
  beta.forEach(x => x + '-')
  beta |> logger
  
  