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Lodash _.isNil


The Lodash library provides a number of useful functions for working with arrays, objects, and other data structures in JavaScript. One of the most useful is the _.isNil method, which provides a simple way to check whether a given value is either null or undefined.

Using _.isNil is easy. Simply call the method with the value you want to check, and it will return true if the value is null or undefined, and false otherwise. For example:

_.isNil(null); // true
_.isNil(undefined); // true
_.isNil(0); // false
_.isNil(''); // false
_.isNil(false); // false

Note that _.isNil returns true for both null and undefined. This is because these two values are often used interchangeably in JavaScript to represent the absence of a value.

One of the primary benefits of using _.isNil is that it is a very concise and readable way to check whether a value is null or undefined. This is especially useful when working with complex data structures, where a single value might be deeply nested within multiple layers of objects and arrays.

Another benefit of _.isNil is that it is very fast and lightweight. Because it only needs to check for two specific values, it can quickly determine whether a given value is null or undefined without performing any more complex operations.

Overall, if you need a fast, reliable way to check whether a given value is null or undefined in JavaScript, _.isNil is a great tool to have in your toolkit.