seamless-immutable的使用问题

Question

现在有这么一段数据let a = [{list:[1,2,3]},{list:[4,5,6]}];let aIm = immutable(a);我想把list数组中的每一项都加1，应该怎么写？

Answer 1

let list = Immutable.fromJS([{list:[1,2,3]},{list:[4,5,6]}])

list.map(item => item.updateIn(['list'], list => list.map(n => ++n))).toJS()

Answer 2

a.map(x => {

    return x.list.map(y => y+1)

})

Answer 3

可以这样做，用两层reduce来实现：

(() => {

  let a = [{list: [1, 2, 3]}, {list: [4, 5, 6]}]

  let aIm = Immutable(a)

  aIm = aIm.reduce((aIm, item, index) =>

    aIm.updateIn([index, 'list'], add), aIm)

  function add (arr) {

    return arr.reduce((arr, item, index) =>

      arr.updateIn([index], plus), arr)

  }

  function plus (x) {

    return x + 1

  }

  console.log(aIm)

})()