38 lines
No EOL
1.4 KiB
JavaScript
38 lines
No EOL
1.4 KiB
JavaScript
import curry from "./curry.js";
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/**
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* Makes a descending comparator function out of a function that returns a value
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* that can be compared with natural sorting using localeCompare.
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*
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* @func
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* @memberOf R
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* @since v0.30.1
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* @category Function
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* @sig Ord b => s -> (a -> b) -> a -> a -> Number
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* @param {String|Array} locales A string with a BCP 47 language tag, or an array of such strings. Corresponds to the locales parameter of the Intl.Collator() constructor.
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* @param {Function} fn A function of arity one that returns a value that can be compared
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* @param {*} a The first item to be compared.
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* @param {*} b The second item to be compared.
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* @return {Number} `-1` if a occurs after b, `1` if a occurs before b, otherwise `0`
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* @see R.descend
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* @example
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*
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* const unsorted = ['3', '1', '10', 'Ørjan', 'Bob', 'Älva'];
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*
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* R.sort(R.descendNatural('en', R.identity), unsorted);
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* // => ['Ørjan', 'Bob', 'Älva', '10', '3', '1']
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*
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* R.sort(R.descendNatural('sv', R.identity), unsorted);
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* // => ['Ørjan', 'Älva', 'Bob', '10', '3', '1']
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*
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* R.sort(R.descend(R.identity), unsorted);
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* // => ['Ørjan', 'Älva', 'Bob', '3', '10', '1']
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*/
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var descendNatural = /*#__PURE__*/curry(function descendNatural(locales, fn, a, b) {
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const aa = fn(a);
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const bb = fn(b);
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return bb.localeCompare(aa, locales, {
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numeric: true
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});
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});
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export default descendNatural; |