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Lodash _.isArrayLikeObject


The _.isArrayLikeObject method in lodash is a utility function that determines if a given value is array-like. An array-like object is any object that has implemented a length property and whose property keys are numeric.

This method takes a single argument and returns a boolean value. If the argument is array-like, the method will return true, otherwise it will return false.

To determine if an object is array-like, the _.isArrayLikeObject method first checks if the object is an array. If it is an array, the method will return true. If the object is not an array, the method will check if the object has a length property. If the object has a length property, the method will check if the property keys are numeric. If the object passes both checks, the method will return true.

This method is useful in cases where a function needs to handle both arrays and array-like objects. For example, the _.each method in lodash can accept both arrays and array-like objects, making it a useful utility for iterating over collections.

Example Usage:

const _ = require('lodash');

_.isArrayLikeObject([1, 2, 3]);
// => true

// => true

_.isArrayLikeObject({length: 4, '0': 'a', '1': 'b', '2': 'c', '3': 'd'});
// => true

_.isArrayLikeObject({property: 'value'});
// => false

In summary, the lodash _.isArrayLikeObject method is a helpful utility function for determining if a given value is an array-like object. Its implementation is efficient and it can be used to make functions more flexible by accepting both arrays and array-like objects.