Function isEmpty

Checks if value is an empty object, collection, map, or set.

Objects are considered empty if they have no own enumerable string keyed properties.

Array-like values such as arguments objects, arrays, buffers, strings, or jQuery-like collections are considered empty if they have a length of 0. Similarly, maps and sets are considered empty if they have a size of 0.

heavy operation

isEmpty(null)
// => true

isEmpty(true)
// => true

isEmpty(1)
// => true

isEmpty([1, 2, 3])
// => false

isEmpty('abc')
// => false

isEmpty({ 'a': 1 })
// => false
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