Run-length encoding: Difference between revisions
Content added Content deleted
| Line 2,959: | Line 2,959: | ||
-> [[12,"W"],[1,"B"],[12,"W"],[3,"B"],[24,"W"],[1,"B"],[14,"W"]] |
-> [[12,"W"],[1,"B"],[12,"W"],[3,"B"],[24,"W"],[1,"B"],[14,"W"]] |
||
-> "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW"</pre> |
-> "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW"</pre> |
||
A <code>.reduce()</code> based one-liner |
|||
<lang javascript> |
|||
const rlEncode = (s: string) => s.match(/(.)\1*/g).reduce((result,char) => result+char.length+char[0],"") |
|||
const rlValidate = (s: string) => /^(\d+\D)+$/.test(s) |
|||
const rlDecode = (s: string) => rlValidate(s) ? s.match(/(\d[a-z\s])\1*/ig).reduce((res,p) => res+p[p.length-1].repeat(parseInt(p)),"") : Error("Invalid rl") |
|||
</lang> |
|||
=={{header|jq}}== |
=={{header|jq}}== |
||