nashorn/samples/for_each.js
author alanb
Sat, 17 Jun 2017 08:03:05 +0100
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/*
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 * Copyright (c) 2014, 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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// nashorn supports for..each extension supported
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// by Mozilla. See also
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for_each...in
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var strs = [ "hello", "world" ];
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for each (str in strs)
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    print(str);
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// create a java int[] object
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var JArray = Java.type("int[]");
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var arr = new JArray(10);
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// store squares as values
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for (i in arr)
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    arr[i] = i*i;
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// for .. each on java arrays
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print("squares");
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for each (i in arr)
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    print(i);
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var System = Java.type("java.lang.System");
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// for..each on java Iterables
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// print System properties as name = value pairs
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print("System properties");
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for each (p in System.properties.entrySet()) {
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    print(p.key, "=", p.value);
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}
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// print process environment vars as name = value pairs
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print("Process environment");
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for each (e in System.env.entrySet()) {
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    print(e.key, "=", e.value);
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}