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* ♻️ refactor: improving and fixing some code * Updated Documentation in README.md * ♻️ refactor: improving isLeapYear * 🐛 chore: back changes * 🐛 fix: using reduce instead forEach * 🐛 fix: using reduce instead forEach * 🐛 fix: removing duplicated code * 🐛 chore: removing .js --------- Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
42 lines
1.6 KiB
JavaScript
42 lines
1.6 KiB
JavaScript
/*
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DateDayDifference Method
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------------------------
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DateDayDifference method calculates the number of days between two dates.
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Algorithm & Explanation : https://ncalculators.com/time-date/date-difference-calculator.htm
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*/
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// Internal method for make calculations easier
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const isLeap = (year) => {
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if (year % 400 === 0) return true
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else if (year % 100 === 0) return false
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else if (year % 4 === 0) return true
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else return false
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}
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const DateToDay = (dd, mm, yyyy) => {
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return Math.floor((365 * (yyyy - 1)) + ((yyyy - 1) / 4) - ((yyyy - 1) / 100) + ((yyyy - 1) / 400) + dd + (((367 * mm) - 362) / 12) + (mm <= 2 ? 0 : isLeap(yyyy) ? -1 : -2))
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}
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const DateDayDifference = (date1, date2) => {
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// firstly, check that both input are string or not.
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if (typeof date1 !== 'string' || typeof date2 !== 'string') {
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return new TypeError('Argument is not a string.')
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}
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// extract the first date
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const [firstDateDay, firstDateMonth, firstDateYear] = date1.split('/').map((ele) => Number(ele))
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// extract the second date
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const [secondDateDay, secondDateMonth, secondDateYear] = date2.split('/').map((ele) => Number(ele))
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// check the both data are valid or not.
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if (firstDateDay < 0 || firstDateDay > 31 ||
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firstDateMonth > 12 || firstDateMonth < 0 ||
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secondDateDay < 0 || secondDateDay > 31 ||
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secondDateMonth > 12 || secondDateMonth < 0) {
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return new TypeError('Date is not valid.')
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}
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return Math.abs(DateToDay(secondDateDay, secondDateMonth, secondDateYear) - DateToDay(firstDateDay, firstDateMonth, firstDateYear))
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}
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// Example : DateDayDifference('17/08/2002', '10/10/2020') => 6630
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export { DateDayDifference }
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