node_modules/loupe/lib/array.js

import { inspectProperty, inspectList } from './helpers'

export default function inspectArray(array, options) {
  // Object.keys will always output the Array indices first, so we can slice by
  // `array.length` to get non-index properties
  const nonIndexProperties = Object.keys(array).slice(array.length)
  if (!array.length && !nonIndexProperties.length) return '[]'
  options.truncate -= 4
  const listContents = inspectList(array, options)
  options.truncate -= listContents.length
  let propertyContents = ''
  if (nonIndexProperties.length) {
    propertyContents = inspectList(
      nonIndexProperties.map(key => [key, array[key]]),
      options,
      inspectProperty
    )
  }
  return `[ ${listContents}${propertyContents ? `, ${propertyContents}` : ''} ]`
}