I cannot understand doc for sortBy about remeda HOT 3 CLOSED

It looks like you have a typing issue that isn't related to Remeda directly. I can't help you without seeing how everything is typed, you might be returning undefined in your mapper.

Here's an example that does work:
https://www.typescriptlang.org/play?#code/JYWwDg9gTgLgBAJTgMyhEcBEUCmIcAmAhpgNwBQ5MAnmDnAKIB2MwNcAvHAN7lxxMi+AFxwAzjCjAmAcwr88RYABtREqbIoBfClVr0AwhGUBXEEwDK0VrIDyUAjiicefcTCIwcozAEELBphwAD5YACIMAWRuANY41GqS0nLkOpQAxhBMEnA4LGzAOGKizKw0ANoAui5VFJnZ8GLWTsVwRqbmVrDJ9o5QVTWVuvU5TbBiLggAdCBEYAAUbmNeUGIANG7z3O6eOGtwcdRwWgCUnAB8bvzlV-xw896M+TRnHOf3h5wcXJgAFjjKZQQIIAflyU0E+DgohwU0UKhOGzudwkuy+P38gTgYMwRDE6SCPkc+MwSLu1TxcBGMHIJ2GWVGzQIkymywAQtQHs9Cus4FN+csxHTyEA

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As far as I remember (without running the code) you probably need to

1. use as const at the end of the tuple (in the initial "sorts" mapper) so that typescript treats your array as an array of tuples and not an array of arrays. If the typing of sorts isn't correct when you use it in sortBy, Remeda won't be able to infer it. e.g. arr.map((item) => [(e) => { ... }, "asc"] as const)
2. You don't need that last sorts[0], simply spread the array.

from remeda.

@eranhirsch thanks for that. I tried this:

const sorts = sorters.map(sorter =>
      [(x: Entity) => x[sorter.key], sorter.state === ColumnSortingState.Descending ? 'desc' : 'asc'] as const
);
return R.sortBy(entities, ...sorts);

So that compiles, but when I run it, I get:

ERROR TypeError: fn is not a function
    at sortBy.js:40:14
    at Array.sort (<anonymous>)
    at sortBy (sortBy.js:39:46)
    at Module.f2 (_curry2.js:28:14)

Thanks

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