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Lodash _.isNumber


The Lodash library provides various utility functions for JavaScript development. One such function is the _.isNumber() method, which is used to determine if a given value is a number or not. The _.isNumber() method returns a boolean value, true if the given value is a number and false otherwise.

The _.isNumber() method can be passed any value as an argument, and it internally utilizes the typeof operator to determine if the value is a number. The typeof operator returns a string that indicates the data type of the value.

If the returned typeof value is "number", the _.isNumber() method returns true. If the value is not a number, the _.isNumber() method returns false.

Here is an example of how to use the _.isNumber() method:

const lodash = require('lodash');

console.log(lodash.isNumber(5)); // Output: true
console.log(lodash.isNumber('hello')); // Output: false
console.log(lodash.isNumber(NaN)); // Output: true

In the above example, we import the Lodash library using the require() method and then call the lodash.isNumber() method with various arguments. The first call to the method passes the number 5 as an argument, which returns true. The second call passes the string 'hello', which returns false. The third call passes the NaN value, which returns true.

In summary, the _.isNumber() method in the Lodash library is an essential utility function for JavaScript development, and it allows developers to easily and quickly determine if a given value is a number or not. Additionally, it helps in enhancing the overall code readability and maintainability.