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What is the difference between up-casting and down-casting with respect to class variable
...ent and articulate answer. Pretty much sums up everything I need to know about Casting.
– Gautham Honnavara
Nov 16 '16 at 20:14
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Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
...e convenience of not having to do that yourself, but you would easily sort out the problem.
Another option - if you cannot change the JSON - would be to construct a wrapper to fit the structure of your JSON input - and use that instead of Collection<COrder>.
Hope this helps.
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Getting output of system() calls in Ruby
If I call a command using Kernel#system in Ruby, how do I get its output?
15 Answers
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How do you copy a record in a SQL table but swap out the unique id of the new row?
... Awesome. Worked like a charm. It was so obvious once you wrote it out. Thanks!!
– Kilhoffer
Sep 29 '08 at 17:42
1
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How to get the user input in Java?
...Scanner reader = new Scanner(System.in); // Reading from System.in
System.out.println("Enter a number: ");
int n = reader.nextInt(); // Scans the next token of the input as an int.
//once finished
reader.close();
share
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How to properly compare two Integers in Java?
...k for reference equality - i.e.
Integer x = ...;
Integer y = ...;
System.out.println(x == y);
this will check whether x and y refer to the same object rather than equal objects.
So
Integer x = new Integer(10);
Integer y = new Integer(10);
System.out.println(x == y);
is guaranteed to print f...
“Large data” work flows using pandas
I have tried to puzzle out an answer to this question for many months while learning pandas. I use SAS for my day-to-day work and it is great for it's out-of-core support. However, SAS is horrible as a piece of software for numerous other reasons.
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How to construct a set out of list items in python?
...have a list of filenames in python and I would want to construct a set out of all the filenames.
6 Answers
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How do I upgrade PHP in Mac OS X?
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You may want to check out Marc Liyanage's PHP package. It comes in a nice Mac OS X installer package that you can double-click. He keeps it pretty up to date.
http://php-osx.liip.ch/
Also, although upgrading to Snow Leopard won't help you do PHP...
How do I compare strings in Java?
...ullString1 = null;
String nullString2 = null;
// Evaluates to true
System.out.print(nullString1 == nullString2);
// Throws a NullPointerException
System.out.print(nullString1.equals(nullString2));
So if you know that fooString1 may be null, tell the reader that by writing
System.out.print(fooSt...