通过查找值AngularJS在数组中添加键

Question

I am trying to add an extra key in a JSON array by searching any key value.

Example JSON:-

[
  {
    "$id": "2025",
    "ID": 41,
    "Name": "APPLE"
  },
  {
    "$id": "2026",
    "ID": 45,
    "Name": "MANGO"
  },
  {
    "$id": "2027",
    "ID": 48,
    "Name": "GUAVA"
  }
]

Suppose I have to add a new key pair example "Price": 50 after "Name": "MANGO" or by finding ID ID": 45 . So my expected new JSON will be :-

[
  {
    "$id": "2025",
    "ID": 41,
    "Name": "APPLE"
  },
  {
    "$id": "2026",
    "ID": 45,
    "Name": "MANGO",
    "Price": 50
  },
  {
    "$id": "2027",
    "ID": 48,
    "Name": "GUAVA"
  }
]

It must add on the object related to matched search key.

So, I am not able to find out any function related to the issue.

Answer 1

You can run a loop and check the condition and then add a property to an object. Here is a running code snippet. You can read here more about JavaScript Objects

 var myarray = [ { "$id": "2025", "ID": 41, "Name": "APPLE" }, { "$id": "2026", "ID": 45, "Name": "MANGO" }, { "$id": "2027", "ID": 48, "Name": "GUAVA" } ] for(var i=0;i<myarray.length;i++){ if(myarray[i].$id === "2025" || myarray[i].Name === "APPLE"){ var data = myarray[i]; data.price = 50 } } console.log(myarray) 

Answer 2

You can use array#find to compare the ID . Then based that you can add Price key to the object.

 let arr = [ { "$id": "2025", "ID": 41, "Name": "APPLE" }, { "$id": "2026", "ID": 45, "Name": "MANGO" }, { "$id": "2027", "ID": 48, "Name": "GUAVA" } ], id = 45, obj = arr.find(({ID}) => ID === id); if(obj); obj.Price = 50; console.log(arr); 

Answer 3

You can try with:

data.find(item => item.ID === 45).price = 50;

To cover the case if item is not available:

(data.find(item => item.ID === 45) || {}).price = 50;