Checks if the a value is an empty object/collection, has no enumerable properties or is any type that is not considered a collection.

Compares two objects to determine if the first one contains equivalent property values to the second one, based on a provided function.

Converts an object to a Map.

Creates a function that invokes the method at a given key of an object, optionally prepending any additional supplied parameters to the arguments.

Combines two arrays of objects, using the specified key to match objects.

Converts a Map to an object.

Converts an array of objects into an array of values corresponding to the specified key.

Gets the size of an array, object or string.

Checks if the predicate function is truthy for all elements of a collection.

The constructor is arguably the most crucial part of any JavaScript class, which is why you might want to take a closer look at what they return.

Dynamically adding object properties can be pretty slow in some cases. Here's how to optimize it.

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Property enumerability dictates how JavaScript object properties behave in different scenarios.

Creates a function that invokes fn with a given context, optionally prepending any additional supplied parameters to the arguments.

Checks if an object is deeply frozen.