javascript - 分割并展平逗号分隔字符串的数组

Question

最好的转换方式是什么:

const a = ["jan,feb,may", "apr,may,sept,oct", "nov,jan,mar", "dec", "oct,feb,jan"]

至

const res = ["jan","feb","may","apr","may","sept","oct","nov","jan","mar","dec","oct","feb","jan"]

PS:在javascript中，我尝试使用array.reduce()和分割方法。但这没有用。这是我尝试过的

let flat = arr.reduce((arr, item) => [...arr, ...item.split(',')]);

Answer 1

使用Array#flatMap和 String#split :

const a = ["jan,feb,may", "apr,may,sept,oct", "nov,jan,mar", "dec", "oct,feb,jan"];

const res = a.flatMap(e => e.split(','));

console.log(res);