alex-r89

import * as React from 'react'
import { ApolloProvider } from '@apollo/client'

import { initApolloClient } from './apollo-client'

/*
  This wrapper helps to provide Apollo functionality during SSR, while rehydrating
  on the client with a pre-populated cache of the query results.
  Refer to https://github.com/zeit/next.js/blob/canary/examples/api-routes-apollo-server-and-client/apollo/client.js
  for more source.

alex-r89

Hackerrank Solutions

Easy

Array Matrix (Diagonal Difference)

Given a square matrix, calculate the absolute difference between the sums of its diagonals.

function diagonalDifference(arr) {
  // arr eg: [ [ 11, 2, 4 ], [ 4, 5, 6 ], [ 10, 8, -12 ] ]
    
    const arrLength = arr.length