Question

我有两个像

这样的哈希

h1 = {
  DateTime.new(2015, 7, 1),in_time_zone => 0,
  DateTime.new(2015, 7, 2).in_time_zone => 10, 
  DateTime.new(2015, 7, 4).in_time_zone => 20, 
  DateTime.new(2015, 7, 5).in_time_zone => 5
}

h2 = {
  DateTime.new(2015, 7, 1).in_time_zone => 0,
  DateTime.new(2015, 7, 2).in_time_zone => 0,
  DateTime.new(2015, 7, 3).in_time_zone => 0
}

我想要合并h1和h2，如果密钥已经存在则不要合并，这样会产生类似的结果（带有时区的日期时间格式以便于阅读）

result
#=> {
#     Wed, 01 Jul 2015 01:00:00 EST +01:00 => 0,
#     Thu, 02 Jul 2015 01:00:00 EST +01:00 => 10,
#     Fri, 03 Jul 2015 01:00:00 EST +01:00 => 0,
#     Sat, 04 Jul 2015 01:00:00 EST +01:00 => 20,
#     Sun, 05 Jul 2015 01:00:00 EST +01:00 => 5
#   }

我尝试使用h1.merge(h2)和h2.merge(h1)，但可以将h2的键和值设置为h1。

Answer 1

public static boolean validateWithExtXSDUsingSAX(String xml, String xsd)
        throws ParserConfigurationException, IOException {
    try {
        SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setValidating(false);
        factory.setNamespaceAware(true);

        SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI));
        SAXParser parser = null;
        try {
            factory.setSchema(schemaFactory.newSchema(new Source[] { new StreamSource(xsd) }));
            parser = factory.newSAXParser();
        } catch (SAXException se) {
            System.out.println("SCHEMA : " + se.getMessage()); // problem in the XSD itself
            return false;
        }

        XMLReader reader = parser.getXMLReader();
        reader.setErrorHandler(new ErrorHandler() {
            @Override
            public void warning(SAXParseException e) throws SAXException {
                System.out.println("WARNING: " + e.getMessage()); // do nothing
            }

            @Override
            public void error(SAXParseException e) throws SAXException {
                System.out.println("ERROR : " + e.getMessage());
                throw e;
            }

            @Override
            public void fatalError(SAXParseException e) throws SAXException {
                System.out.println("FATAL : " + e.getMessage());
                throw e;
            }
        });
        reader.parse(new InputSource(xml));
        return true;
    } catch (ParserConfigurationException pce) {
        throw pce;
    } catch (IOException io) {
        throw io;
    } catch (SAXException se) {
        return false;
    }
}

您将只有三个键值对，而不是您期望的5，因为Ruby中的哈希是唯一键的集合及其值。

将散列与另一个散列合并

1 个答案: