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Difference between object and class in Scala
...n instance first:
class A() {
def twice(i: Int): Int = 2 * i
}
val a = new A()
a.twice(2)
You can see how redundant this is, as twice does not require any instance-specific data.
object as a special named instance
You can also use the object itself as some special instance of a class or trai...
What is the best open XML parser for C++? [duplicate]
...tional mapping with a tree-like, in-memory data structure. C++/Parser is a new, SAX-like mapping which represents the information stored in XML instance documents as a hierarchy of vocabulary-specific parsing events. In comparison to C++/Tree, the C++/Parser mapping allows one to handle large XML do...
How to list all installed packages and their versions in Python?
...calendar netrc
DcxImagePlugin cdrom new
Dialog cgi nis
DiscID cgitb nntplib
DistUpgrade checkbox ntpath
...
Maximum number of records in a MySQL database table
... month. Then change your programming to work with this model. Maybe make a new table with less information to summarize the data in less columns and then only refer to the bigger partitioned tables when you need more information such as when the user is viewing their profile. All of this should be c...
Checking oracle sid and database name
...ecial permissions are needed for the queries above. Verified by creating a new user with CONNECT privilege only.
– bdeem
Aug 3 '15 at 15:18
...
What is object serialization?
..., that contains the default values.
SerializationSample instance = new SerializationSample();
// The "ObjectOutputStream" class has the default
// definition to serialize an object.
ObjectOutputStream oos = new ObjectOutputStream(
// ...
How do I wrap text in a pre tag?
...nt in the stylesheet fixes all the problems.
– Jared Newnam
Feb 9 '18 at 16:46
1
@webfrogs Yes, m...
SQL Server Script to create a new user
...reating a User account for the login in a specific database:
CREATE LOGIN NewAdminName WITH PASSWORD = 'ABCD'
GO
Here is how you create a User with db_owner privileges using the Login you just declared:
Use YourDatabase;
GO
IF NOT EXISTS (SELECT * FROM sys.database_principals WHERE name = N'New...
What is the string concatenation operator in Oracle?
... edited Mar 3 '14 at 10:07
Vidar S. Ramdal
96111 gold badge1010 silver badges3535 bronze badges
answered Nov 10 '08 at 15:45
...
How can I save an image with PIL?
...unction () {
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...