Clojurians Log v2

Good morning

👋

Morning!

Mornin

månmån

morning

morning

morning

o/

\o morning

morning

Morning

What do people think about re-using (shadowing) names in lets? I've got into the habit of naming a variable after the function that produced it. It seems 'cleaner' (no extra arbitrary names) but you can get some confusing errors if you slip up.

;; reuse name
(let [age-in-years    (age-in-years person (now))
      body-mass-index (body-mass-index person)
      smoker?         (smoker? person)]
  (risk-of-heart-disease age-in-years body-mass-index smoker?))

;; or... arbitrary abbreviations
(let [age    (age-in-years person (now))
      bmi    (body-mass-index person)
      smokes (smoker? person)]
  (risk-of-heart-disease age bmi smokes))

;; or... systematic prefix (something like a-, an-, the-, is-)
(let [the-age-in-years    (age-in-years person (now))
      the-body-mass-index (body-mass-index person)
      is-smoker           (smoker? person)]
  (risk-of-heart-disease the-age-in-years the-body-mass-index is-smoker))

;; or... systematic prefix (based on 'p' for person, in this case)
(let [p-age-in-years    (age-in-years person (now))
      p-body-mass-index (body-mass-index person)
      p-smoker?         (smoker? person)]
  (risk-of-heart-disease p-age-in-years p-body-mass-index p-smoker?))

I suppose in this case there's a good argument for avoiding the let (and this problem) altogether. But in general, I sometimes find it hard to come up with the arbitrary name.

morning

Morning

@thomas am I still in Strictly? I’ve not kept up.

No, I think you failed in the dance off last week.

😞

Yeah, shadowing sometimes leads to gotchas but like you say good names are indeed scarce and sometimes hard to think of. Don't think there's a right answer.

That clojure is a "lisp-1" is one of the little things that common lispers grumble about in clojure. https://andersmurphy.com/2019/03/08/lisp-1-vs-lisp-2.html

Morning!