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re-formate wth standard.js
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@ -47,16 +47,16 @@ const DateToDay = (date) => {
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// extarct the date
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const [day, month, year] = date.split('/').map((x) => Number(x))
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// check the data are valid or not.
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if ( day < 0 || day > 31 || month > 12 || month < 0) {
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if (day < 0 || day > 31 || month > 12 || month < 0) {
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return new TypeError('Date is not valid.')
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}
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// divide year to century and yearDigit value.
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const yearDigit = (year % 100)
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const century = Math.floor(year / 100)
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// Apply the algorithm shown above
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const weekDay = Math.abs((day + Math.floor((2.6 * calcMonthList[month]) - 0.2) - (2 * century) + yearDigit + Math.floor(yearDigit/4) + Math.floor(century/4)) % 7)
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const weekDay = Math.abs((day + Math.floor((2.6 * calcMonthList[month]) - 0.2) - (2 * century) + yearDigit + Math.floor(yearDigit / 4) + Math.floor(century / 4)) % 7)
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// return the weekDay name.
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return daysNameList[weekDay];
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return daysNameList[weekDay]
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}
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// Example : DateToDay("18/12/2020") => Friday
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