Beginner Exercism • javascript

Transpose

Challenge Overview

Given an input text output it transposed.

💡 View Solution

export const transpose = (matrix) => {
  if (matrix.length === 0) return [];
  const maxLen = Math.max(...matrix.map(row => row.length));
  
  return Array.from({ length: maxLen }, (_, i) =>
    matrix.reduce((acc, row, j) => {
      const char = row[i] || (matrix.slice(j).some(r => r[i]) ? ' ' : '');
      return acc + char;
    }, '')
  );
};