How to check if a value is a safe integer using Lodash

Overview

An integer is a safe integer if:

• It can be represented as an IEEE-754 double-precision number.
• It is not a result of any integer rounded to be represented as an IEEE-754 double-precision number.

Note: Any integer that falls in the range [-(2^53 - 1), 2^53 - 1] is a safe integer.

We can use the _.isSafeInteger() method in Lodash to check if a value is a safe integer.

Syntax

The syntax to check the safe integer is:

Parameters

This method accepts the following parameters:

• value: This is the value to be checked.

Return value

This method returns true if the value is a safe integer. Otherwise, it returns false.

Coding example

Let’s look at an example of the _.isSafeInteger() method in the code snippet below:

Code explanation

In the HTML tab:

• Line 5: We import the lodash library.

In the JavaScript tab:

• Lines 2 to 9: We create a function isValueASafeInteger() that accepts a value and checks if it is a safe integer using the _.isSafeInteger() method, and print the result on the console.

• Line 12 to 16: We create a few variables and initialize them.
• Line 19 to 23: We invoke the isValueASafeInteger() function for each of the variables declared.