sudoku validation

validityCheck.ts

function rowValidity(row: number[]): boolean {
  const numSet = new Set(row);
  const deDupedRow = Array.from(numSet);
  const allNumsInValidRange = deDupedRow.reduce((acc, cur) => {
    if (cur < 1 || cur > 9 || acc === false) {
      return false;
    } else {
      return true;
    }
  }, true);
  const inputLengthIsValid = row.length === 9;
  const noDuplicates = deDupedRow.length === 9;
  return allNumsInValidRange && inputLengthIsValid && noDuplicates;
}

function validityTest(puzzle: number[][]): boolean {
  const allRowsAreValid = puzzle.reduce((acc, row) => acc ? rowValidity(row) : false, true);
  console.log('allRowsAreValid:', allRowsAreValid);

  let allColumnsValid = true;
  for (let i = 0; i < puzzle.length; i++) {
    if (allColumnsValid) {
      let column = puzzle.map(row => row[i])
      allColumnsValid = rowValidity(column)
    }
  }
  console.log('allColumnsValid:', allColumnsValid);

  let allSquaresValid = true;
  for (let i = 0; i < puzzle.length; i += 3) {
    for (let j = 0; j < puzzle.length; j += 3) {
      if (allSquaresValid) {
        const square = [
          puzzle[i][j], puzzle[i+1][j], puzzle[i+2][j],
          puzzle[i][j+1], puzzle[i+1][j+1], puzzle[i+2][j+1],
          puzzle[i][j+2], puzzle[i+1][j+2], puzzle[i+2][j+2]
        ]
        allSquaresValid = rowValidity(square)
      }
    }
  }
  console.log('allSquaresValid:', allSquaresValid);

  return allRowsAreValid && allColumnsValid && allSquaresValid;
}

const input1 =  [
  [5, 3, 4, 6, 7, 8, 9, 1, 2],
  [6, 7, 2, 1, 9, 5, 3, 4, 8],
  [1, 9, 8, 3, 4, 2, 5, 6, 7],

  [8, 5, 9, 7, 6, 1, 4, 2, 3],
  [4, 2, 6, 8, 5, 3, 7, 9, 1],
  [7, 1, 3, 9, 2, 4, 8, 5, 6],

  [9, 6, 1, 5, 3, 7, 2, 8, 4],
  [2, 8, 7, 4, 1, 9, 6, 3, 5],
  [3, 4, 5, 2, 8, 6, 1, 7, 9]
];
const input2 =  [
  [5, 3, 4, 6, 7, 8, 9, 1, 2],
  [6, 7, 2, 1, 9, 5, 3, 4, 1],
  [1, 9, 8, 3, 4, 2, 5, 6, 7],

  [8, 5, 9, 7, 6, 1, 4, 2, 3],
  [4, 2, 6, 8, 5, 3, 7, 9, 1],
  [7, 1, 3, 9, 2, 4, 8, 5, 6],

  [9, 6, 1, 5, 3, 7, 2, 8, 4],
  [2, 8, 7, 4, 1, 9, 6, 3, 5],
  [3, 4, 5, 2, 8, 6, 1, 7, 9]
];

console.log(validityTest(input1))
console.log(validityTest(input2))