Code: Select all
> (first (lambda (x y) (+ x y)))
lambda
> (first (fn (x y) (+ x y)))
fn
> 'lambda
lambda
> 'fn
fn
> (cons 'fn '((x y) (+ x y)))
(fn (x y) (+ x y))
Why could not quote *lambda* and *fn*?
Code: Select all
> (first (lambda (x y) (+ x y)))
lambda
> (first (fn (x y) (+ x y)))
fn
> 'lambda
lambda
> 'fn
fn
> (cons 'fn '((x y) (+ x y)))
(fn (x y) (+ x y))
lambda is a property of a list, and not a symbol at its beginning; an example:ssqq wrote:I think first lambda expression should is 'lambda:
Why newLISP use args as first elements of lambda expression?Code: Select all
> (first (lambda (x y) (+ x y))) lambda > (first (fn (x y) (+ x y))) fn > 'lambda lambda > 'fn fn > (cons 'fn '((x y) (+ x y))) (fn (x y) (+ x y))
Why could not quote *lambda* and *fn*?
Code: Select all
> (set 'li (cons '(x y) (cons '(+ x y) '())))
((x y) (+ x y))
> (first li)
(x y)
> (set 'la (cons '(x y) (cons '(+ x y) '(lambda))))
(lambda (x y) (+ x y))
> (first la)
(x y)
>
Code: Select all
> (li 3 4)
ERR: invalid list index
> (la 3 4)
7
>
... The fn or lambda word does not exist on its own as a symbol, but indicates a special list type: the lambda list. ...