lnked/react-starter

export const compare = (a1: any[], a2: any[]): boolean =>
  !!(a1 && a2 && a1.length === a2.length && a1.every((v, i) => v === a2[i]))

export function shallowCompare (prev: any, next: any, uniq: string | number): boolean {
  const prevKeys = prev.map((item: any) => item[uniq])
  const diffData = next.filter((item: any) => prevKeys.indexOf(item[uniq]) < 0)

  return diffData && diffData.length === 0
}

// const isEq = exports.isEq = function isEq(a, b) {
//     if (a == b) return true;

//     for (let i in a) {
//         if (!isEq(a[i], b[i])) return false
//     }

//     for (let i in b) {
//         if (!isEq(a[i], b[i])) return false
//     }

//     return true
// }