@nodescript/stdlib/out/nodes/Array.Cartesian.js

Standard Node Definitions

export const module = {
    version: '1.1.3',
    moduleName: 'Array / Cartesian',
    description: `
        Computes a Cartesian product of a two-dimensional array.
    `,
    keywords: ['combinations'],
    params: {
        array: {
            schema: {
                type: 'array',
                items: {
                    type: 'array',
                    items: { type: 'any' },
                },
            },
        },
    },
    result: {
        schema: {
            type: 'array',
            items: { type: 'any' },
        }
    },
};
export const compute = params => {
    const { array } = params;
    if (array.length === 0) {
        return [];
    }
    let buf = array[0].map(_ => [_]);
    let current = [];
    for (const list of array.slice(1)) {
        for (const existing of buf) {
            for (const item of list) {
                current.push([...existing, item]);
            }
        }
        buf = current;
        current = [];
    }
    return buf;
};