如何根据A数组将B数组组装为新数组？

Question

let A = ['A', 'B', 'C']

let B = [
  ['1A'],
  ['2A','2C']
]

根据 A 数组将 B 数组组装一个新数组

newArr = [
  ['1A', null, null],
  ['2A', null, '2C']
]

我要的新数组

newArr = [
  ['1A', null, null],
  ['2A', null, '2C']
]

Answer 1

const conv = (schema, source) => source.map(a => {
    const dict = {}
    a.forEach(i => {
        const name = i.at(-1) //  没有给出具体的数据格式，假定和 A 匹配的字符串就是最后一位
        dict[name] = i
    })
    return schema.map(name => dict[name] ?? null)
})

Answer 2

let A = ['A', 'B', 'C'];
let B = [
  ['1A'],
  ['2A','2C']
];

let newArr = B.map(subArr => A.map(letter => subArr.find(item => item.endsWith(letter)) || null));

console.log(newArr);