Is it possible, somehow, to sort array with some "between" numbers?
[31, 33/34, 34, 29].sort((a, b) => a.toString().localeCompare(b.toString()))
//to return [29, 31, 33/34, 34] instead [0.9705882352, 29, 31, 34]
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Allan Smithee
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7you need strings as data. – Nina Scholz May 16 '22 at 17:24
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I was wondering if converting the decimal representation to fraction would help here, but 0.5 can be transformed to multiple ranges, say 1/2 or 50/100. – Gabriel Pellegrino May 16 '22 at 17:34
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Strings data - I know, but the challenge is - if it's possible with numbers (and exact number format 33/34) – Allan Smithee May 16 '22 at 17:44
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2That is impossible since that is `0.9705882352`. We have no clue what was used to get that number. If you want this to work, you need to use strings as the first comment said. – epascarello May 16 '22 at 17:45
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As mentioned in the comments, the only way this will work is if you use string to capture the numbers. The engine is going to store your 33/34 as the decimal. There is no way to get the original value back.
Doing it is just a simple parse and sort.
var nums = ['31', '33/34', '34', '29']
nums.sort((a, b) => Number(a.split('/')[0]) - Number(b.split('/')[0]));
console.log(nums);Now you may need to add more logic if you can have multiple numbers to push the 33/34 to the right spot. Not knowing all of the use cases, I am going to not try to guess.
epascarello
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*"There is no way to get the original value back."* That statement is a bit too absolute. See for instance this related question: [How to convert floats to human-readable fractions?](https://stackoverflow.com/questions/95727/how-to-convert-floats-to-human-readable-fractions) ([and this javascript answer](http://stackoverflow.com/a/681534/1934901)) or [Wikipedia: Continued fraction # Best rational approximations](https://en.wikipedia.org/wiki/Continued_fraction#Best_rational_approximations) – Stef May 16 '22 at 19:44
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@Stef You can not guarantee it was a reduced value. If you can guarantee it, then maybe there is a chance you can process it like crazy to get it. OR you just store the data correctly to start and there is nothing to do. – epascarello May 17 '22 at 12:58
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When converting to string your are converting the fraction 33/34 (=0.9705882352). That's all that's visible the JS interpreter: it does not matter whether you provided 0.9705882352 or 33/34 or 66/68. So as indicated by @ninascholz & @epascarello, you have to start off with strings. With strings, your code should work fine as in the demo below:
const nums = ['31', '33/34', '34', '29']
nums.sort((a, b) => a.localeCompare(b));
console.log( nums );
PeterKA
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