Extracting Data from an object in javascript

Question

I am having a object called ItemData which consists of other properties. I would like to extract only the numbered items from it. below is the body of ItemData. I have tried using map but it throws error says ItemData is an object. I can use item[0] and item[1] but there are going to be many arrays in the object. Is there a structure way to extract 0 and 1 items.

ItemData

{
  0: { "daysIn": "2", "daysOut": "3", "category": "Day Shift" },
  1: { "daysIn": "5", "daysOut": "6", "category": "Day Shift" },
  type: "Fixed Multiple", 
  Status: "Active"
}

There is no "array" here. '0' and '1' are just object keys, not array indexes. You could look for all keys that are numbers and build an array based on that. — crashmstr
– crashmstr, Commented Feb 3, 2021 at 19:59

crashmstr · Accepted Answer · 2021-02-03 20:05:20Z

4

You don't have an array, but you can iterate over the keys that are numbers and build an array of those values.

const ItemData = {
  0: {
    "daysIn": "2",
    "daysOut": "3",
    "category": "Day Shift"
  },
  1: {
    "daysIn": "5",
    "daysOut": "6",
    "category": "Day Shift"
  },
  type: "Fixed Multiple",
  Status: "Active"
}

function getArray(obj) {
  const result = [];
  const keys = Object.keys(obj);
  for (const k of keys) {
    if (Number(k) == k) {
      result[k] = obj[k];
    }
  }
  return result;
}

const arr = getArray(ItemData);
console.log(arr);

answered Feb 3, 2021 at 20:05

crashmstr

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Comments

Faizan Shaikh · Accepted Answer · 2021-02-03 20:13:14Z

0

Try this....

var obj = {
      0: { "daysIn": "2", "daysOut": "3", "category": "Day Shift" },
      1: { "daysIn": "5", "daysOut": "6", "category": "Day Shift" },
      type: "Fixed Multiple", 
      Status: "Active"
    }
    var result = Object.keys(obj).map((key) => [key, obj[key]]);
    
    console.log(result);

answered Feb 3, 2021 at 20:13

Faizan Shaikh

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Comments

Alan Omar · Accepted Answer · 2021-02-03 20:15:33Z

0

let obj={0:{daysIn:"2",daysOut:"3",category:"Day Shift"},1:{daysIn:"5",daysOut:"6",category:"Day Shift"},type:"Fixed Multiple",Status:"Active"};

let result = Object.entries(obj)
              .filter(e => Number.isInteger(+e[0]))
              .map(([_,v]) => v)
              
              
console.log(result)

answered Feb 3, 2021 at 20:15

Alan Omar

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Comments

chaimm · Accepted Answer · 2021-02-03 20:45:05Z

0

you can turn it into an array and loop through it to return what you want. I would use reduce since you can customize what and how you return the data.

Object.keys(ItemData).reduce((accumlated, current) => {
    if (Number(current)) {
        accumlated[current] = ItemData[current];
    }
    return accumlated
}, {});

this will return an object consisting of only the properties that are numbered.

if you would like it returned in an array you can just change the initial value for the reduce

Object.keys(ItemData).reduce((accumlated, current) => {
    if (Number(current)) {
        accumlated.push(ItemData[current]);
    }
    return accumlated
}, []);

edited Feb 3, 2021 at 20:45

answered Feb 3, 2021 at 20:05

chaimm

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