Map 一个数组键值

Question

The key value of my array is another array. I want to filter only the array value.

This is my array:

const array = [{
    work: [{
      day: 'Monday',
      number: 8
    }]
  },
  {
    work: [{
      day: 'Tuesday',
      number: 5
    }]
  },
  {
    work: [{
      day: 'Saturday',
      number: 4
    }]
  },
]

My desired array is:

const desiredArray = [{
  day: 'Monday',
  number: 8
}, {
  day: 'Tuesday',
  number: 5
}, {
  day: 'Saturday',
  number: 4
}];

I have tried

const desiredArray  = Object.values(array)
const desiredArray  = Object.keys(array).map(item => array[item])

neither of which worked.

Answer 1

You can use .flatMap() to get the desired output:

 const input = [{ work: [{ day: 'Monday', number: 8 }] }, { work: [{ day: 'Tuesday', number: 5 }] }, { work: [{ day: 'Saturday', number: 4 }] }]; const output = input.flatMap(({ work }) => work); console.log(output);

 .as-console-wrapper { max-height: 100%;important: top; 0; }

Answer 2

You can use map to return a new array from the given array.

 const array = [{ work: [{ day: 'Monday', number: 8 }] }, { work: [{ day: 'Tuesday', number: 5 }] }, { work: [{ day: 'Saturday', number: 4 }] }, ] const desired = array.map(item => item.work[0]); console.log(desired);

Answer 3

Use map and flat .

array.map(Object.values).flat(2)

 const array = [{ work: [{ day: 'Monday', number: 8 }] }, { work: [{ day: 'Tuesday', number: 5 }] }, { work: [{ day: 'Saturday', number: 4 }] }, ] console.log(array.map(Object.values).flat(2))