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55 lines
1.4 KiB
55 lines
1.4 KiB
"use strict"; |
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Object.defineProperty(exports, "__esModule", { value: true }); |
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exports.reverse = exports.compare = exports.compareEach = exports.compareByRev = exports.compareBy = void 0; |
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function compareBy(extract, ...extractors) { |
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const compareFns = [extract, ...extractors] |
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.map((ex) => (typeof ex === 'function' ? ex : (t) => t[ex])) |
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.map((ex) => (a, b) => _compare(ex(a), ex(b))); |
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return compareEach(...compareFns); |
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} |
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exports.compareBy = compareBy; |
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function compareByRev(extract, ...extractors) { |
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return reverse(compareBy(extract, ...extractors)); |
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} |
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exports.compareByRev = compareByRev; |
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function compareEach(...compareFn) { |
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return (a, b) => { |
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for (const fn of compareFn) { |
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const r = fn(a, b); |
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if (r) { |
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return r; |
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} |
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} |
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return 0; |
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}; |
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} |
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exports.compareEach = compareEach; |
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function _compare(a, b) { |
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if (a === b) |
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return 0; |
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if (a === undefined) |
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return 1; |
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if (b === undefined) |
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return -1; |
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if (a === null) |
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return 1; |
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if (b === null) |
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return -1; |
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if (a < b) |
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return -1; |
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if (a > b) |
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return 1; |
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return 0; |
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} |
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function compare(a, b) { |
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return _compare(a, b); |
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} |
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exports.compare = compare; |
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function reverse(fn) { |
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return (a, b) => { |
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const r = fn(a, b); |
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return r ? -r : 0; |
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}; |
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} |
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exports.reverse = reverse; |
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//# sourceMappingURL=Comparable.js.map
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