37 lines
946 B
TypeScript
37 lines
946 B
TypeScript
/**
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* Compare numerical primary keys represented as strings.
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* For example, '10' (as a string) is considered less than '9'
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* when sorted alphabetically. So compare string length first.
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*
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* - `0`: id1 == id2
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* - `1`: id1 > id2
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* - `-1`: id1 < id2
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*/
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const compareId = (id1: string, id2: string) => {
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if (id1 === id2) {
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return 0;
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}
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if (id1.length === id2.length) {
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return id1 > id2 ? 1 : -1;
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} else {
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return id1.length > id2.length ? 1 : -1;
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}
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};
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/**
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* Compare by dates, where most recent date is returned first.
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*
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* @param dateString1 - string that is parsable by Date
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* @param dateString2 - string that is parsable by Date
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* @returns 1 | -1 | 0
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*/
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const compareDate = (dateString1: string, dateString2: string) => {
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const date1 = new Date(dateString1);
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const date2 = new Date(dateString2);
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if (date2 < date1) return -1;
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if (date2 > date1) return 1;
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return 0;
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};
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export { compareId, compareDate };
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