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