One point worth making is that Python lambdas are artificially restricted:
the body of a Python lambda may only be a single expression, not a sequence
of statements.�� This restriction is for ideological reasons (the BDFL does
not *want* you to do that) not for technical reasons.�� Lisp and Algol 68
were doing lambda expressions in the 60s.

As well as function (x, y) { ... },
modern Javascript has (x, y) => ...
with subtly different semantics.



On Thu, 16 May 2019 at 01:03, Hilaire <hilaire@drgeo.eu> wrote:
Hi,

We, Smalltalkers, use bloc of code as easily as we breathe air.

I am writing an article on Smalltalk programming for a French
mathematics teachers magazine.

To illustrate the simplicity of Smalltalk, I would like to compare how
the bloc of code 'f' and 'df' below will be implemented in Javascript
and Python:


f := [ :x | x cos + x ].
df := [ :x | (f value: x + 1e-8) - (f value: x) * 1e8].

Here f is a way to implement a function and df its derivate.

Do some of you knows how it will be written in Javascript and Python
with their own ad-hoc anonymous function?

Thanks

Hilaire

--
Dr. Geo
http://drgeo.eu