Question

如果我有以下数组

let array = [
  {review: 'not_started', status: ''},
  {review: 'not_started', status: ''},
  {review: 'not_started', status: ''},
  {review: 'not_started', status: ''}
]

如果对数组中的所有元素的审核为not_started，我想将第一个的状态更新为Begin here，将其他状态更新为已锁定。喜欢这里

let array = [
  {review: 'not_started', status: 'Begin here'},
  {review: 'not_started', status: 'locked'},
  {review: 'not_started', status: 'locked'},
  {review: 'not_started', status: 'locked'}
]

当第一个评论为completed时，请将其状态更新为completed，将第二个状态更新为Begin here，将其他状态更新为locked，如此处

let array = [
      {review: 'completed', status: 'completed'},
      {review: 'not_started', status: 'Begin here'},
      {review: 'not_started', status: 'locked'},
      {review: 'not_started', status: 'locked'}
    ]

如果完成前两个元素审核，则数组将如下所示

let array = [
      {review: 'completed', status: 'completed'},
      {review: 'completed', status: 'completed'},
      {review: 'not_started', status: 'Begin here'},
      {review: 'not_started', status: 'locked'}
    ]

我尝试循环遍历数组（.map）但无法弄清楚如何根据审核更新状态。

我如何做出反应？

由于

Answer 1

let array = [
  {review: 'not_started', status: ''},
  {review: 'not_started', status: ''},
  {review: 'not_started', status: ''},
  {review: 'not_started', status: ''}
]
let not_started = true;
array.forEach((item)=>{
  if(item.review!=='not_started'){
    not_started=false;
  }
})
if(not_started){
  array = array.map((item,index)=>{
    if(index==0){
      return {review: 'not_started', status: 'Begin here'}
    }
    else return {review: 'not_started', status: 'locked'}
  })
}
/////////////////////second part of the question/////////////////////////////

for(let i=0;i<array.length;i++){
  if(array[i].review==='completed'){
    array[i].status='completed';
    if(array[i+1].review==='completed')
    continue;
    else{
     array[i+1] = {review: 'not_started', status: 'Begin here'};
     i++;
    }
  }
  else {
    array[i]= {review: 'not_started', status: 'locked'};
  }
}
console.log(array)

Answer 2

let all_reviews_not_started = true
let modified_state = []

array.forEach(item => {
  if(item.review !== 'not_started') {
      all_reviews_not_started = false
    }
})

if(all_reviews_not_started) {
  modified_state = array.map((item, i) => {
    if(i == 0) return {review: 'not_started', status: 'Begin Here'}
    else {review: 'not_started', status: 'locked'}
  })
} else {
  modified_state = [...array]
  array.forEach((item, i) => {
    if(item.review == 'completed' && modified_state[i+1].status == 'locked'){
     modified_state[i].status = 'completed'
     modified_state[i+1] = {review: 'not_started', status: 'Begin here'}
    }
}

Answer 3

 let STATUS_BEGIN = 'Begin here';
 let STATUS_LOCKED = 'locked';
 let STATUS_COMPLETE = 'completed';
 let STATUS_NOT_STARTED = 'not_started';

    function updateStatus(array) {
        var count = 0;
        array.forEach(function(e, i) {
            if (e.review == STATUS_NOT_STARTED && e.status != STATUS_BEGIN) {
                count = count + 1;
            }
            if (e.review == STATUS_COMPLETE && e.status != STATUS_COMPLETE) {
                count = count + 1;
            }
            if (e.review == STATUS_NOT_STARTED && count == 1) {

                e.status = STATUS_BEGIN;


            } else if (e.review == STATUS_COMPLETE && count == 1) {
                e.status = STATUS_COMPLETE;
                if (array[i + 1]) array[i + 1].status = STATUS_BEGIN;

            } else if (e.status != STATUS_BEGIN && e.status != STATUS_COMPLETE) {
                e.status = STATUS_LOCKED;
            }

        })
        return array;

    }

    let array = [{
            review: STATUS_NOT_STARTED,
            status: ''
        },
        {
            review: STATUS_NOT_STARTED,
            status: ''
        },
        {
            review: STATUS_NOT_STARTED,
            status: ''
        },
        {
            review: STATUS_NOT_STARTED,
            status: ''
        }
    ]

    updateStatus(array);

根据其值更新数组元素

3 个答案: