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JavaScript (Node.js), 67 60 bytes o=>r=>Buffer(o).map(c=>c%32<26&c>64?(c%32+r)%26+c-c%32:c)+'' Try it online! o=>r=> // Define a function taking o an...

posted 3y ago by A username‭ · edited 3y ago by A username‭

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#2: Post edited by

A username‭ · 2021-08-07T00:30:42Z (over 3 years ago)

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~~# [JavaScript (Node.js)], 67 bytes~~
~~o=>r=>(b=Buffer)(b(o).map(c=>c%32<26&c>64?(c%32+r)%26+c-c%32:c))+''~~
~~[Try it online!][TIO-krnf2y5z]~~
[JavaScript (Node.js)]: https://nodejs.org
[TIO-krnf2y5z]: https://tio.run/##FcfBDoIwDADQX/GCa7NA4jA7GDsST575g1GG0VRKBurnz/Bu7xW/ceX8XLZ61jGVnopSyBRgoNtnmlJGGECxeccFmAJXrbs6f@Tgzx3ssxkr5y3Xey6MaI0prPOqkhrRB/Rg7klEDz/NMhqEU4tY/g "JavaScript (Node.js) – Try It Online"
```
~~o=>r=>( // Define a function taking o and r~~
~~b = Buffer // Assign b to Buffer~~
)( // And call on...
~~b(o).map(c=> // a Buffer of the charcodes of o, mapped to...~~
c%32<26&c>64 // If the character is alphabetical - charcode%32 is less than 26, charcode is >64
? // Then
(c%32+r)%26+c-c%32 // Rot-n the character - Mod 32, add r, mod 26, add correct number depending on whether it's uppercase of lowercase.
:c) // Else return the original string
) + '' // Coerce to string
~~```~~

# [JavaScript (Node.js)], <s>67</s> 60 bytes
o=>r=>Buffer(o).map(c=>c%32<26&c>64?(c%32+r)%26+c-c%32:c)+''
[Try it online!][TIO-ks11i9h2]
[JavaScript (Node.js)]: https://nodejs.org
[TIO-ks11i9h2]: https://tio.run/##FcfBDoIwDADQX/GCa7NAwiA7GDcTT5z5g6UMo6mUFJXPn@Hd3iv90kb6XD/1IlMuYygSooZ4/85zVhBs3mkFCpGqzl2dP1P0/Q2OWcXKeUv1kQuhNaaQLJtwblgeMIIZMrOcdlGeDELbIZY/ "JavaScript (Node.js) – Try It Online"
```
o=>r=> // Define a function taking o and r, and returning...
Buffer(o).map(c=> // a Buffer of the charcodes of o, mapped to...
c%32<26&c>64 // If the character is alphabetical - charcode%32 is less than 26, charcode is >64
? // Then
(c%32+r)%26+c-c%32 // Rot-n the character - Mod 32, add r, mod 26, add correct number depending on whether it's uppercase of lowercase.
:c) // Else return the original string
) + '' // Coerce to string
```
-7 thanks to Shaggy.

#1: Initial revision by

A username‭ · 2021-07-28T11:45:46Z (over 3 years ago)

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# [JavaScript (Node.js)], 67 bytes

<!-- language-all: lang-javascript -->

    o=>r=>(b=Buffer)(b(o).map(c=>c%32<26&c>64?(c%32+r)%26+c-c%32:c))+''

[Try it online!][TIO-krnf2y5z]

[JavaScript (Node.js)]: https://nodejs.org
[TIO-krnf2y5z]: https://tio.run/##FcfBDoIwDADQX/GCa7NA4jA7GDsST575g1GG0VRKBurnz/Bu7xW/ceX8XLZ61jGVnopSyBRgoNtnmlJGGECxeccFmAJXrbs6f@Tgzx3ssxkr5y3Xey6MaI0prPOqkhrRB/Rg7klEDz/NMhqEU4tY/g "JavaScript (Node.js) – Try It Online"

```
o=>r=>(                // Define a function taking o and r
  b = Buffer           // Assign b to Buffer
)(                     // And call on...
  b(o).map(c=>         // a Buffer of the charcodes of o, mapped to...
    c%32<26&c>64       // If the character is alphabetical - charcode%32 is less than 26, charcode is >64
      ?                // Then
    (c%32+r)%26+c-c%32 // Rot-n the character - Mod 32, add r, mod 26, add correct number depending on whether it's uppercase of lowercase.
    :c)                // Else return the original string
 ) + ''                // Coerce to string
```

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