计算任意多个维度有限元素生成的所有向量组合

generateCombinationsFromLists.js

const lists = [
	[1, 2],
	[3, 4],
	[5],
	[7]
];

const combinations = lists
	.reduce((all, current) => current
		.map(item => all.map(g => g.concat([item])))
		.reduce((prev, curr) => prev.concat(curr), [])
	, [[]]);

console.log(combinations);
/*
[
	[ 1, 3, 5, 7 ],
	[ 2, 3, 5, 7 ],
	[ 1, 4, 5, 7 ],
	[ 2, 4, 5, 7 ]
]
*/