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Different names of JSON property during serialization and deserialization
....setRed((byte) 5);
ObjectMapper mapper = new ObjectMapper();
System.out.println("Serialization: " + mapper.writeValueAsString(c));
Coordinates r = mapper.readValue("{\"red\":25}",Coordinates.class);
System.out.println("Deserialization: " + r.getR());
Result:
Serialization: {"r":5}
Deserializati...
Is the primary key automatically indexed in MySQL?
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According to http://dev.mysql.com/doc/refman/5.0/en/constraint-primary-key.html it would appear that this is would be implicit
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How to implement a queue using two stacks?
...ter science.
Lets imagine our stack like a bottle as below;
If we push integers 1,2,3 respectively, then 3 will be on the top of the stack. Because 1 will be pushed first, then 2 will be put on the top of 1. Lastly, 3 will be put on the top of the stack and latest state of our stack represented ...
Mysql - How to quit/exit from stored procedure
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Great! You even point out that the END proc_label; syntax (shown in most official MySQL examples) is not needed. (this is a great way to comment out a stored proc without having to scroll to the bottom to put */ in place)
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How to create your own library for Android development to be used in every program you write?
...he new module
folder, make sure it's displaying the Android
view.
Convert an app module to a library module
If you have an existing app module with all the code you want to
reuse, you can turn it into a library module as follows:
Open the module-level build.gradle file.
Del...
How to copy Java Collections list
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To create a deep copy, the List, via either mechanism, would have to have intricate knowledge of the underlying type. In the case of Strings, which are immutable in Java (and .NET for that matter), you don't even need a deep copy. In the case of MySpecialObject, you need to know how to make a deep ...
What are Transient and Volatile Modifiers?
...aking the object's state persistent. That means the state of the object is converted into a stream of bytes to be used for persisting (e.g. storing bytes in a file) or transferring (e.g. sending bytes across a network). In the same way, we can use the deserialization to bring back the object's state...
How do I break a string over multiple lines?
...le removes single newlines within the string (but adds one at the end, and converts double newlines to singles):
Key: >
this is my very very very
long string
→ this is my very very very long string\n
| Literal style turns every newline within the string into a literal newline, and adds ...
How to create Temp table with SELECT * INTO tempTable FROM CTE Query
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Sample DDL
create table #Temp
(
EventID int,
EventTitle Varchar(50),
EventStartDate DateTime,
EventEndDate DatetIme,
EventEnumDays int,
EventStartTime Datetime,
EventEndTime DateTime,
EventRecurring Bit,
EventType int
)
;WI...
Collect successive pairs from a stream
...to make some calculations. Most common usage is to calculate differences:
int[] pairwiseDiffs = IntStreamEx.of(input).pairMap((a, b) -> (b-a)).toArray();
For object stream you can create any other object type. My library does not provide any new user-visible data structures like Pair (that's t...