https://github.com/issotm/numflip-golf
Code golfing contest: flip a number's digits
https://github.com/issotm/numflip-golf
code-golf golfing
Last synced: 3 months ago
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Code golfing contest: flip a number's digits
- Host: GitHub
- URL: https://github.com/issotm/numflip-golf
- Owner: ISSOtm
- Created: 2020-12-04T17:13:30.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2020-12-06T16:13:43.000Z (over 4 years ago)
- Last Synced: 2025-02-13T17:53:25.001Z (4 months ago)
- Topics: code-golf, golfing
- Language: sed
- Homepage:
- Size: 85.9 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# numflip-golf
Code golfing contest: flip a number's digits!
## Rules
### Goal
Write a function or method that takes an integer between -999,999,999 and 999,999,999 (inclusive), and returns the integer whose decimal digits are flipped. Try making the source code as small as possible!
Examples: `flip(5678) == 8765`, `flip(-541) == -145`, `flip(-100) == -1`.
### Scoring
- Each character part of the function counts for 1 point, **including spaces and newlines**
- The lower the amount of points, the better
- Import / preproc directives, any global variables, etc. required for the function to work **are counted as well**
- If using an online compiler (such as [tio.run](https://tio.run)), any "boilerplate" necessary for the program to run will not be counted (`main` function, etc.), unless it falls into the clause above
- For readability, newlines and comments that do not matter to the functionality will not be counted
- Execution time and memory footprint are not relevant; it just needs to terminate *eventually*
### Languages
All languages are allowed, with one leaderboard per language. (If you do it in Java, you'll still stand a chance to be #1!). Esoteric languages are accepted, but less relevant to this kind of challenge.
### Constraints
- The function parameter and return types must be numeric, unless the language makes that impossible (such as `bash`)
- Non-standard imports are **not allowed**, even if popular (so no boost, lodash, numpy...)
- The program execution must be deterministic
- Relying on language extensions will be allowed on a case-by-case basis
- Lambdas are accepted, but only if stored in a named variable (so they can be called like a normal function)
- The code must be self-sufficient, thus it may not rely on external files, the program's file name, or touch the file system
### Provision
- The rules may be changed at any time to patch loopholes
- Rule-bending submissions are accepted, and will be scored separately (see the [troll](/ISSOtm/numflip-golf/tree/master/troll))
- Anything litigious will be left to my own discretion :)