1 | var getWhatYear = require('./getWhatYear')
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2 | var toStringDate = require('./toStringDate')
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3 |
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4 | var isValidDate = require('./isValidDate')
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5 | var isLeapYear = require('./isLeapYear')
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6 |
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7 | /**
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8 | * 返回某个年份的天数
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9 | *
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10 | * @param {Date} date 日期或数字
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11 | * @param {Number} offset 年(默认当年)、前几个年、后几个年
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12 | * @return {Number}
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13 | */
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14 | function getDayOfYear (date, year) {
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15 | date = toStringDate(date)
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16 | if (isValidDate(date)) {
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17 | return isLeapYear(getWhatYear(date, year)) ? 366 : 365
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18 | }
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19 | return NaN
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20 | }
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21 |
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22 | module.exports = getDayOfYear
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