Marc Mintel
5397309103
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47 lines
1.2 KiB
Plaintext
47 lines
1.2 KiB
Plaintext
import { toDate } from "./toDate.js";
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/**
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* @name compareAsc
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* @category Common Helpers
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* @summary Compare the two dates and return -1, 0 or 1.
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*
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* @description
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* Compare the two dates and return 1 if the first date is after the second,
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* -1 if the first date is before the second or 0 if dates are equal.
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*
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* @param dateLeft - The first date to compare
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* @param dateRight - The second date to compare
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*
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* @returns The result of the comparison
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*
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* @example
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* // Compare 11 February 1987 and 10 July 1989:
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* const result = compareAsc(new Date(1987, 1, 11), new Date(1989, 6, 10))
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* //=> -1
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*
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* @example
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* // Sort the array of dates:
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* const result = [
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* new Date(1995, 6, 2),
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* new Date(1987, 1, 11),
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* new Date(1989, 6, 10)
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* ].sort(compareAsc)
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* //=> [
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* // Wed Feb 11 1987 00:00:00,
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* // Mon Jul 10 1989 00:00:00,
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* // Sun Jul 02 1995 00:00:00
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* // ]
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*/
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export function compareAsc(dateLeft, dateRight) {
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const diff = +toDate(dateLeft) - +toDate(dateRight);
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if (diff < 0) return -1;
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else if (diff > 0) return 1;
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// Return 0 if diff is 0; return NaN if diff is NaN
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return diff;
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}
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// Fallback for modularized imports:
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export default compareAsc;
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