Underscore.js _.invert() function is used to return the copy of an object where the object key is converted into value and object value is converted into the key. It means the [key, value] of the object is reversed.
Syntax:
_.invert( object );Parameters:
- object: It contains the object element that holds the elements of key and value pair.
Return Value:
It returns the [key, value] of an object in reverse [value, key] order.
Example 1: The below code will explain the implementation of the _.invert() function in underscore.js.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
const obj = {
Company: "GeeksforGeeks",
Address: "Noida",
Contact: "+91 9876543210",
Email: "abc@gfg.com"
}
console.log(_.invert(obj));
</script>
</body>
</html>
Output:
Example 2: The below code example is another implementation of the _.invert() function.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
const inv = _.invert({
num1: 10,
num2: 20,
num3: 30,
num4: 40
});
console.log(inv);
</script>
</body>
</html>
Output:
