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What is the rationale behind having companion objects in Scala?
...lly that important)
with different possible sets of parameters (compare to what Bloch writes in Effective Java about telescoping constructor)
with the ability to to decide which derived class you want to create instead of the abstract (accompanied) one
Example code:
abstract class AbstractClass;
...
How to explain Katana and OWIN in simple words and uses?
...ioned Katana v3 will most likely be last major release, so moving forward, what framework will be used to replace Katana?
– Vincent
Jul 1 '15 at 3:48
2
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What is the best way to ensure only one instance of a Bash script is running? [duplicate]
What is the simplest/best way to ensure only one instance of a given script is running - assuming it's Bash on Linux?
14 An...
What is this weird colon-member (“ : ”) syntax in the constructor?
...in C++.
Simply said, it initializes your member bar to a value num.
What is the difference between Initializing and Assignment inside a constructor?
Member Initialization:
Foo(int num): bar(num) {};
Member Assignment:
Foo(int num)
{
bar = num;
}
There is a significant difference b...
What blocks Ruby, Python to get Javascript V8 speed? [closed]
...
What blocks Ruby, Python to get Javascript V8 speed?
Nothing.
Well, okay: money. (And time, people, resources, but if you have money, you can buy those.)
V8 has a team of brilliant, highly-specialized, highly-experienced ...
Why do we need boxing and unboxing in C#?
...ot a reference to something somewhere (after all, it's just a number). So, what you do is this: you make a new object that can store the int and then you assign a reference to that object to o. We call this process "boxing."
So, if you don't care about having a unified type system (i.e., reference...
Why do you create a View in a database?
...
3 Is really the most powerful property of views. It's what help provides logical data independence the fact that you can provide an interface to the DB independent of the underlying logical database is a very powerful concept.
– Falaina
Oct...
What is best tool to compare two SQL Server databases (schema and data)? [duplicate]
...erver databases including schema (table structure) and data in tables too. What is best tool to do this?
15 Answers
...
How to fix Error: laravel.log could not be opened?
...bserver user and group depend on your webserver and your OS. to figure out what's your web server user and group use the following commands. for nginx use:
ps aux|grep nginx|grep -v grep
for apache use:
ps aux | egrep '(apache|httpd)'
...
Python: Tuples/dictionaries as keys, select, sort
...ally, one of the things I love about python is the tuple-dict combination. What you have here is effectively a 2d array (where x = fruit name and y = color), and I am generally a supporter of the dict of tuples for implementing 2d arrays, at least when something like numpy or a database isn't more a...