57 lines
2.4 KiB
JavaScript
57 lines
2.4 KiB
JavaScript
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# compute Mothers day of the given the year
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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Oracle nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// print "Mother's day" of the given year using Java Time API
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if (arguments.length == 0) {
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print("Usage: jjs mothers_day.js -- year");
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exit(1);
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}
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// java classes used
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var DayOfWeek = java.time.DayOfWeek;
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var LocalDate = java.time.LocalDate;
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var TemporalAdjusters = java.time.temporal.TemporalAdjusters;
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var year = parseInt(arguments[0]);
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// See: https://en.wikipedia.org/?title=Mother%27s_Day
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// We need second Sunday of May. Make April 30 of the given
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// year adjust and adjust to next Sunday from there twice. To adjust a Date
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// we use a common TemporalAdjuster provided in JDK8.
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// https://docs.oracle.com/javase/8/docs/api/java/time/temporal/TemporalAdjusters.html
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print(LocalDate.of(year, 4, 30).
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with(TemporalAdjusters.next(DayOfWeek.SUNDAY)).
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with(TemporalAdjusters.next(DayOfWeek.SUNDAY)));
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