Mathematica is a decent general-purpose language (though closed-source) and its "map the factorial function over the list" is exactly the same length as the quo

Mathematica is a decent general-purpose language (though closed-source) and its "map the factorial function over the list" is exactly the same length as the quoted J code: #!&/@l It has the same "everything is a list" problem - it's really verbose at handling strings, for example, and last I checked its date-time handling was not only verbose but also [flat-out wrong](https://mathematica.stackexchange.com/q/239480/30771 https://mathematica.stackexchange.com/q/239480/30771). But it does support the dynamism mentioned immediately below, if you use `SetDelayed` (`:=`) rather than `Set` (`=`).