create square of numbers - look at result file

numbersSquareV1.js

function addBeforeAfter(arr, item){
  return [item].concat(arr).concat([item])
}

function createLine(counter, min){
  const minNum = Math.max(counter, min);
  return counter > 1 ? addBeforeAfter(createLine(counter - 1, min), minNum) : [minNum]
}

function createSquare(counter, max){
  const line = createLine(max, counter);
  return counter > 1 ? addBeforeAfter(createSquare(counter - 1, max), line) : [line]
}

function run(n){
  return createSquare(n, n)
      .map(line => line.join(''))
      .join('\n')
}

console.log(run(3));
console.log(run(7));

numbersSquareV2.js

function recursionFactory(baseObjFunc){
  return function recursive(counter, limit){
    const base = baseObjFunc(limit, counter);
    return counter > 1 ? [base].concat(recursive(counter - 1, limit)).concat([base]) : [base];
  }
}

const createLine = recursionFactory(Math.max);
const createSquare = recursionFactory(createLine);

function run(n){
  return createSquare(n, n)
      .map(line => line.join(''))
      .join('\n')
}

console.log(run(3));
console.log(run(7));

result

run(3) :

33333
32223
32123
32223
33333

run(7): 

7777777777777
7666666666667
7655555555567
7654444444567
7654333334567
7654322234567
7654321234567
7654322234567
7654333334567
7654444444567
7655555555567
7666666666667
7777777777777