#Emacs lisp code#

Anaphoric functions start with 2 dashes instead of 1: (-reduce-r-from (cons (+ it 2) acc) '() (number-sequence 1 10))

#Emacs lisp code#

Guess what, it isn't necessary in dash.el with anaphoric macros, which allow special syntax by exposing variables of a lambda as shortcuts, like it and acc in folds. 13.11.1 Primitives to manipulate advices 13.11.2 Advising Named Functions 13.11.3 Ways to compose advice 13.11.4 Adapting code using the old defadvice 13.12 Declaring Functions Obsolete 13.13 Inline Functions 13.14 The declare Form 13. If functions are shared between threads, then they canвЂ™t be mutable Otherwise you expose yourself to dataraces. This means you can change a function by mutating itвЂ™s return value. Im a Python developer with experience in (full stack) web app development. For one, function literals are mutable in lisp. Get help from Emacs Lisp tutors & expert developers.

(-reduce-r-from (lambda (x acc) (cons (+ x 2) acc)) '() (number-sequence 1 10)) Elisp This brought up some interesting challenges that Emacs lisp presents concurrency, all related to mutability and aliasing. For example, to increment every element by 2, Haskell's currying and sections would allow for terse code, but in Elisp you would usually write verbose throwaway lambdas like that: foldr ((:). You probably know, that folds are very general, and it is possible to implement maps and filters via folds. (-reduce-from '+ 0 (number-sequence 1 10)) Elisp Sum of a range 1 to 10 using folds might look like in this in Haskell and dash.el: foldl (+) 0 - Haskell Haskell's folds correspond with dash.el folds: It also supports anaphoric macros and encourages functional programming, which makes code concise and elegant. I however really like dash.el library, because it provides enormous amounts of functions for list and tree manipulations. CL library is shipped with Emacs by default, so you should stick to it. Common Lisp library provides plenty of sequence functions like mapping, filtering, folding, searching and even sorting.