Type Alias MultidimensionalArray<Element, Dimensions>

MultidimensionalArray: number extends Dimensions
    ? Recursive<Element>
    : IsEqual<Dimensions, 0> extends true
        ? Element
        : MultidimensionalArray<Element, Subtract<Dimensions, 1>>[]

Creates a type that represents a multidimensional array of the given type and dimension.

Use-cases:

  • Return a n-dimensional array from functions.
  • Declare a n-dimensional array by defining its dimensions rather than declaring [] repetitively.
  • Infer the dimensions of a n-dimensional array automatically from function arguments.
  • Avoid the need to know in advance the dimensions of a n-dimensional array allowing them to be dynamic.

Type Parameters

  • Element
  • Dimensions extends number

Example

import type {MultidimensionalArray} from 'type-fest';

function emptyMatrix<T extends number>(dimensions: T): MultidimensionalArray<unknown, T> {
	const matrix: unknown[] = [];

	let subMatrix = matrix;
	for (let dimension = 1; dimension < dimensions; ++dimension) {
		console.log(`Initializing dimension #${dimension}`);

		subMatrix[0] = [];
		subMatrix = subMatrix[0] as unknown[];
	}

	return matrix as MultidimensionalArray<unknown, T>;
}

const matrix = emptyMatrix(3);

matrix[0][0][0] = 42;

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