Underscore.js _.partial() Function

Last Updated : 24 Nov, 2021

The _.partial() function is used to apply partially a function by filling in any number of its arguments, without changing its dynamic value. Syntax:

_.partial(function, *arguments)

Parameters: This function accept two parameters as mentioned above and described below:

function: The function that need to be executed.
arguments: This parameter needs to add some symbols between elements.

Return Value: This function returns the result of partially executed function. Below examples illustrate the _.partial() Function in Underscore.js: Example 1:

html

<!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">

        var product = function (num1, num2) {
            return num1 * num2;
        };

        prod = _.partial(product, 15);
        console.log(prod(18));
    </script>
</body>

</html>

Output:

Example 2:

html

<!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">

        var sum = function (num1, num2, num3) {
            return num1 + num2 + num3;
        };

        sum = _.partial(sum, 15, 25);
        console.log(sum(18));
    </script>
</body>

</html>

Output:

Underscore.js _.memoize() Function

ashokjaiswal

Improve

Article Tags :

Underscore.js _.partial() Function

Similar Reads

Underscore.js Collections Functions

Underscore.js Arrays Functions

Underscore.js Functions

Underscore.js Object Functions

Underscore.js Utility Functions

Underscore.js Questions

Thank You!

What kind of Experience do you want to share?