Function difference

src/utils/jsUtils.ts:2–4

(...arrays: T[][])

// Inspired by https://github.com/you-dont-need/You-Dont-Need-Lodash-Underscore#_difference
export function difference<T>(...arrays: T[][]): T[] {
  return arrays.reduce((a, b) => a.filter(c => !b.includes(c)))
}

// Inspired by https://github.com/you-dont-need/You-Dont-Need-Lodash-Underscore#_sortby-and-_orderby
export function sortBy<T>(array: T[], getter: (item: T) => string | number | boolean): T[] {