Functions to generate data structures.
emacs 27.1higher
- Sequence generation by rules
- List generation by rules
Example ~/.emacs config:
;;; -*- lexical-binding: t; -*-
(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
(package-initialize)
;; The extension file content with all comments removed can be placed here.
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(package-selected-packages '(markdown-mode)))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)All length parameters are optional and defaults to 10.
By convention all parameters are ordered as follows: selector, and length.
Below square brackets are used to represent optional parameters and not arrays.
- Function:
generators-sequence selector [length]Description: Generate a sequence with a specific length. - Function:
generators-list selector [length]Description: Generate a list with a specific length.
Generate a sequence of 5 numbers [2 3 4 5 6]:
(iter-do (item (generators-sequence '(lambda (index) (+ 2 index)) 5)) (message (format "item is %d" item)))Generate a list of 5 numbers [2 3 4 5 6]:
(generators-list '(lambda (index) (+ 2 index)) 5)- Why to use generators to generate sequences? As long as sequences can be extremely long not to consume too much memory it's better to use generators.