Apply error message

[cameyo]

The following expression give me an error:

Code Select Expand

(apply map list '((a 1) (b 2) (c 3)))

ERR: list expected in function apply : list@4095B0

Instead, I wish the output was:

((a b c) (1 2 3))

Can someone help me?

Thanks



cameyo

[Lutz]

Use transpose:

Code Select Expand


> (transpose '((a 1) (b 2) (c 3)))
((a b c) (1 2 3))
>


A hint will be added to the description of list in the manual.

[cameyo]

"transpose" works like i want :-)

But is the expression wrong logically or syntactically?

Why  "apply" does not receive a list?

Thanks again



cameyo

[rickyboy]

But is the expression wrong logically or syntactically?

Why  "apply" does not receive a list?

This is what you had been looking for originally.

Code Select Expand

(apply map (cons list '((a 1) (b 2) (c 3))))

[cameyo]

Thanks.

A big help for me.



cameyo