Discussion on: How to Get an Object Length

[Samantha Ming]

Thanks for chiming in Daniel! Now I can see why Lodash chose size instead of length 😅

[Daniel Escoz]

Notice also that JavaScript itself is choosing size for types like Set or Map: size is a more generic (and mathematical) name that suits more needs better, but nitpicking and pedantry aside, length is perfectly a understandable (and I keep using it for Sets and Maps until I remember that's wrong).

[Sébastien Vercammen]

Clarifying meaning isn't pedantic.

Using size and capacity instead of length on data structures with dynamic lengths was done before JS.

There was probably a discussion somewhere, where they argued for/against both.

Python implements len() as a function with the magic method __len__ precisely to have one consistent way of retrieving an intuitive "length".