36 lines
1.1 KiB
JavaScript
36 lines
1.1 KiB
JavaScript
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import _curry3 from "./internal/_curry3.js";
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/**
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* Makes an ascending comparator function out of a function that returns a value
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* that can be compared with `<` and `>`.
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*
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* @func
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* @memberOf R
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* @since v0.23.0
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* @category Function
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* @sig Ord b => (a -> b) -> a -> a -> Number
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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 fn(a) < fn(b), `1` if fn(b) < fn(a), otherwise `0`
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* @see R.descend
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* @example
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*
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* const byAge = R.ascend(R.prop('age'));
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* const people = [
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* { name: 'Emma', age: 70 },
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* { name: 'Peter', age: 78 },
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* { name: 'Mikhail', age: 62 },
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* ];
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* const peopleByYoungestFirst = R.sort(byAge, people);
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* //=> [{ name: 'Mikhail', age: 62 },{ name: 'Emma', age: 70 }, { name: 'Peter', age: 78 }]
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*/
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var ascend =
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/*#__PURE__*/
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_curry3(function ascend(fn, a, b) {
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var aa = fn(a);
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var bb = fn(b);
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return aa < bb ? -1 : aa > bb ? 1 : 0;
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});
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export default ascend;
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