在javascript中修改对象的键

Question

I have an object of objects and I want to change the keys of the objects

"opening_hours": {
  "0": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "1": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "2": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "3": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "4": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "5": {
    "is_open": false
  },
  "6": {
    "is_open": false
  }
}

like:"0" I want it to be 'Monday', Is this possible in Javascript?

Expected Output is :

{
  "monday": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "tuesday": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "wednesday": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "thursday": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "friday": {
    "close": "17:00:00",
    "is_open": true,
    "open": "09:00:00"
  },
  "saturday": {
    "is_open": false
  },
  "sunday": {
    "is_open": false
  }
}

Answer 1

Create a days array which has index of an item same as the day (Eg: 0 for monday and so on). Loop through the keys of opening_hours object and add new key-value pairs to the output like this:

 const days = ["monday","tuesday","wednesday","thursday","friday","saturday","sunday"], opening_hours = {"0":{close:"17:00:00",is_open:true,open:"09:00:00"},"1":{close:"17:00:00",is_open:true,open:"09:00:00"},"2":{close:"17:00:00",is_open:true,open:"09:00:00"},"3":{close:"17:00:00",is_open:true,open:"09:00:00"},"4":{close:"17:00:00",is_open:true,open:"09:00:00"},"5":{is_open:false},"6":{is_open:false}}, output = {}; for(const key in opening_hours) output[days[key]] = opening_hours[key]; console.log(output) 

You could also map the entries of the object and update the number to days[number] to get the string. Then use Object.fromEntries() to create a new object.

 const days = ["monday","tuesday","wednesday","thursday","friday","saturday","sunday"], opening_hours={"0":{close:"17:00:00",is_open:true,open:"09:00:00"},"1":{close:"17:00:00",is_open:true,open:"09:00:00"},"2":{close:"17:00:00",is_open:true,open:"09:00:00"},"3":{close:"17:00:00",is_open:true,open:"09:00:00"},"4":{close:"17:00:00",is_open:true,open:"09:00:00"},"5":{is_open:false},"6":{is_open:false}}, updatedEntries = Object.entries(opening_hours).map(([k, v]) => [days[k], v]), output = Object.fromEntries(updatedEntries); console.log(output)