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How to remove object from array of objects using JavaScript ?

  • Last Updated : 31 Dec, 2019

Given a JavaScript array containing objects in and the task is to delete certain objects from array of objects. There are two approaches to solve this problem which are discussed below:

Approach 1:

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  • Use array.forEach() method to traverse every object of the array.
  • For each object use delete obj.property to delete the certain object element from array of objects.

Example: This example implements the above approach.




<!DOCTYPE HTML>
<html>
  
<head>
    <title>
        Remove certain property for all objects
        in array with JavaScript.
    </title>
</head>
  
<body style="text-align:center;">
    <h1 style="color: green">  
        GeeksForGeeks  
    </h1>
    <p id="GFG_UP"></p>
  
    <button onclick="gfg_Run()">
        Click Here
    </button>
    <p id="GFG_DOWN" 
       style="color:green;">
    </p>
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var arr = [{
            a: 'Val_1',
            b: 'Val_2'
        }, {
            a: 'Val_3',
            b: 'Val_4'
        }, {
            a: 'Val_1',
            b: 'Val_2'
        }];
        el_up.innerHTML = "Click on the button to delete"
            + " certain property of object.<br>Array - "
            + JSON.stringify(arr);
  
        function gfg_Run() {
            arr.forEach(function(obj) {
                delete obj.a
            });
            el_down.innerHTML = JSON.stringify(arr);
        }
    </script>
</body>
  
</html>

Output:



  • Before clicking the button:
  • After clicking the button:

Approach 2:

  • Use array.map() method to traverse every object of the array.
  • For each object use delete obj.property to delete the certain object from array of objects.

Example: This example implements the above approach.




<!DOCTYPE HTML>
<html>
  
<head>
    <title>
        Remove certain property for all
        objects in array with JavaScript.
    </title>
</head>
  
<body style="text-align:center;">
    <h1 style="color: green">  
        GeeksForGeeks  
    </h1>
    <p id="GFG_UP"></p>
  
    <button onclick="gfg_Run()">
        Click Here
    </button>
    <p id="GFG_DOWN"></p>
  
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var arr = [{
            a: 'Val_1',
            b: 'Val_2'
        }, {
            a: 'Val_3',
            b: 'Val_4'
        }, {
            a: 'Val_1',
            b: 'Val_2'
        }];
        el_up.innerHTML = "Click on the button to delete"
            + " certain property of object.<br>Array - "
            + JSON.stringify(arr);
  
        function gfg_Run() {
            arr.map(function(obj) {
                delete obj.a;
                return obj;
            });
            el_down.innerHTML = JSON.stringify(arr);
        }
    </script>
</body>
  
</html>

Output:

  • Before clicking on the button:
  • After clicking on the button:



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