swap HEAD and TAIL (golfing 🏌) clear solution for Replace First by vincent.tscherter - javascript coding challenges

Enable Javascript in your browser and then refresh this page, for a much enhanced experience.

swap HEAD and TAIL (golfing 🏌) solution in Clear category for Replace First by vincent.tscherter

var replaceFirst = ([f, ...r]) => f ? [...r, f] : []

June 16, 2020

Comments:

greg556 on Aug. 16, 2020, 2:02 p.m.
Too obscure. Programs should be easy to read.

vincent.tscherter on Aug. 16, 2020, 7:54 p.m.
pls, read the title: 🏌 golfing - golfing seeks for short solutions, in the process readablity might suffer. but, you may learn using the spread-op by studing my solution.

lolucky on Oct. 16, 2021, 3:48 p.m.
It actually is pretty concise. if their isn't a first element (and thus no elements), then the result is []. Else, the first is put after the other elements. this is more clear the the push and shift that is currently at the top.

vincent.tscherter on June 9, 2022, 10:07 a.m.
Admittedly, it will fail for ```[0]``` any array which the first value is falsy. Here how to fix it: <pre class='brush: javascript'>var replaceFirst = (a) => { if (!a.length) return []; const [f, ...r] = a; return [...r, f] } </pre>

HiKaGe_47648f7a4cc54bf2a43558d on Oct. 22, 2021, 3:36 a.m.
strongly very simple, this is the best of this mission!

johngeng on June 5, 2022, 11:33 a.m.
Nice one.

victor.shelepen on Jan. 22, 2023, 5:57 p.m.
I've not even thought it was possible to do it by spread operators.

Home

0 %

WebStorm The smartest JavaScript IDE. WebStorm is a powerful JavaScript IDE that makes you productive. Try free!