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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...r. This declaration as a whole means that Function1 is contravariant in P and covariant in R. Thus, we can derive the following axioms:
T1' <: T1
T2 <: T2'
---------------------------------------- S-Fun
Function1[T1, T2] <: Function1[T1', T2']
Notice that T1' must be a subtype (or the ...
How to avoid the “Circular view path” exception with Spring MVC test
...in the same web application.
Exposes model objects as request attributes and forwards the request
to the specified resource URL using a javax.servlet.RequestDispatcher.
A URL for this view is supposed to specify a resource within the web
application, suitable for RequestDispatcher's forwa...
CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
...ll the instance method be defined using the => ("fat arrow") operator and all the static methods being defined using the -> operator?
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close vs shutdown socket?
...nderstood that if we close a socket, it means the socket will be destroyed and can be re-used later.
9 Answers
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Unit testing for C++ code - Tools and methodology [closed]
...entioned in other answers, he was involved in the creation of both CppUnit and CppUnitLite.
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How to exclude a directory in find . command
I'm trying to run a find command for all JavaScript files, but how do I exclude a specific directory?
38 Answers
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psycopg2: insert multiple rows with one query
...", x) for x in tup)
cur.execute("INSERT INTO table VALUES " + args_str)
and 2 minutes when using this method:
cur.executemany("INSERT INTO table VALUES(%s,%s,%s,%s,%s,%s,%s,%s,%s)", tup)
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How do I add a path to PYTHONPATH in virtualenv
... you can also navigate to your virtual environment's site-packages folder and create a symbolic link to the .pth file like this: ln -s path/to/somfile.pth. I found this useful when I needed the same directory to be accessible in multiple virtual environments
– Data-phile
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Order data frame rows according to vector with specific order
...work as long as your target contains exactly the same elements as df$name, and neither contain duplicate values.
From ?match:
match returns a vector of the positions of (first) matches of its first argument
in its second.
Therefore match finds the row numbers that matches target's elements, and...
How to add jQuery in JS file
... is common in most pages I want to make a JS file which will have the code and all the pages using it can reference it from there.
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