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why getNamespaceURI() always return null?


why getNamespaceURI() always return null?

By : user2955844
Date : November 22 2020, 10:48 AM
Does that help From this, you need to set a flag factory.setNamespaceAware(true), like this:
code :
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document input = builder.parse(args[0]);

    Element root = input.getDocumentElement();
    printNSInfo(root);
Element Name:a:NormalExample
Local Name:NormalExample
Namespace Prefix:a
Namespace Uri:http://sonormal.org/
---------------
...continue...


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Best way to alter nullable type, if not null, but return null if null already

Best way to alter nullable type, if not null, but return null if null already


By : Jimmy
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , What's wrong with:
DateTime? firstDay = Day.HasValue ? Day.Value.Add(-14) : Day;
Why does ExecuteScalar() return null when my return values aren't null?

Why does ExecuteScalar() return null when my return values aren't null?


By : Maja Kolar
Date : March 29 2020, 07:55 AM
will be helpful for those in need The problem is in the way you return data. If you want to use ExecuteScalar, you should not RETURN but instead simply SELECT.
If you can't change the SP, but the code, the solution is to read parameter '@outPara' with ExecuteNonQuery().
code :
command1.UpdatedRowSource = UpdateRowSource.OutputParameters;
command1.ExecuteNonQuery();
AppSync Resolver does not return null for null-able array field, but [null]

AppSync Resolver does not return null for null-able array field, but [null]


By : Bhavyesh Gadhethariy
Date : March 29 2020, 07:55 AM
hop of those help? I am using the following Graphql schema: , This setup returns null for items.
Schema:
code :
type Connection {
  items: [String]
}

query {
  listNull: Connection
}
{
    "version" : "2017-02-28",
    "operation" : "Scan",
}
{
}
query ListNull {
  listNull {
    items
  }
}
{
  "data": {
    "listNull": {
      "items": null
    }
  }
}
Parameter specified as non-null is null exception, using gson on web api return null

Parameter specified as non-null is null exception, using gson on web api return null


By : Andrei
Date : March 29 2020, 07:55 AM
help you fix your problem Is your event variable of the MatchResponse class nullable? Something like:
code :
val event: Event?
Why does null||null return a null value but concat(null,null) returns an empty string in postgres?

Why does null||null return a null value but concat(null,null) returns an empty string in postgres?


By : Rima
Date : March 29 2020, 07:55 AM
hop of those help? I'm trying to understand the differences between concat() and || in postgres when using nulls. Why does concat() return an empty string if both sides of the concat are null? , in concat() function:
code :
text concat(str "any",...)  Concatenate all arguments. NULL arguments are ignored.
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