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Comments on Reverse an ASCII string

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Reverse an ASCII string

+11
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Your goal is to reverse an ascii string. Given a (optionally newline or null terminated) input, output your input in reverse order, optionally followed by a newline. Terminate afterward. Function answers will not be given a newline, and are not expected to output one unless they print the answer to console.

Examples

Assume all inputs are followed by a newline, and are all standard ASCII encoded.

abcdef -> fedcba
Hello, World! -> !dlroW ,olleH
racecar -> racecar

Example program

function solution(x) {
    return x.split("").reverse().join("");
}

Further clarifications

  • No, you don't have to handle nulls correctly.
  • Nor empty inputs.
code-golf
posted over 3 years ago
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3y ago
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moony‭
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General comments (7 comments)
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+6
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JavaScript, 25 24 bytes

-1 byte thanks to @Arnauld‭

f=([a,...b])=>a?f(b)+a:b

Try it online!

posted over 3 years ago
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Hakerh400‭
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General comments (2 comments)
General comments
Arnauld‭ wrote almost 3 years ago
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When a is not defined anymore, b is guaranteed to be an empty array. So you can use b instead of the empty string, saving 1 byte.

Hakerh400‭ wrote almost 3 years ago
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@Arnauld‭. I didn't use that because the program would output an array instead of a string in case of an empty string. OP later mentioned that we don't need to cover empty strings, but I missed that. Thanks.