Error: per-column arrays must each be 1-dimensional
This error occurs when working with multidimensional arrays in a way that violates the requirement that each column array must only have one dimension.
Let’s understand this error with an example:
const array = [[1, 2, 3], [4, 5, 6]];
const invalidArray = [[1, 2, 3], [4, 5, 6, 7]];
console.log(array[0]); // [1, 2, 3]
console.log(array[0].length); // 3
console.log(invalidArray[1]); // [4, 5, 6, 7]
console.log(invalidArray[1].length); // 4
In the above example, we have two arrays: array and invalidArray.
The array is a valid 2D array with 2 rows and each row having 3 elements. Accessing array[0] gives us the first row, which is a 1-dimensional array [1, 2, 3].
The invalidArray is also a 2D array with 2 rows, but the second row violates the requirement. It has 4 elements instead of 3. Accessing invalidArray[1] gives us the second row, which is a 1-dimensional array [4, 5, 6, 7].
To fix this error, ensure that all column arrays in your multidimensional array have the same length or dimension.