From Newsgroup: gnu.emacs.help

"H.Singh" <hashish0singh@gmail.com> writes:

Friends,

I am trying to add two sequences like this:

[1 2 3 4 5 6 7 8]
[2 1 2 1 2 1 2 1]

and I can accomplish this using this one liner code in elisp.

(mapcar* (lambda (x y) (+ x y)) ; element-wise addition
[1 2 3 4 5 6 7 8]
[2 1 2 1 2 1 2 1]
)

(seq-mapn #'+ '(2 4 5) '(1 2 3))
(seq-reduce #'+ '(1 2 3 4 5) 0)


(seq-intersection [2 3 4 5] [1 3 5 6 7])
rcA (3 5)

This is right out of the elisp manual. You can view the section on
sequences.

M-x (info "(elisp)Sequence Functions")

Readability is more important than elegance. I do not want write once code that is not easily remembered.

Check out the tutorial on elisp. C-h i RET M elisp
The tutorial is built into emacs via info pages. Check the help menu.
Help > More Manuals > Elisp...

H Singh

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