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Applicatives compose, monads don't
...lies essentially on the extra power of (>>=) to choose a computation from a value, and that can be important. However, supporting that power makes monads hard to compose. If we try to build ‘double-bind’
(>>>>==) :: (Monad m, Monad n) => m (n s) -> (s -> m (n t)) ->...
How do I get the path of the Python script I am running in? [duplicate]
...
Not so sure about that, here a result from OSX 10.6 NameError: global name '__file__' is not defined
– sorin
Apr 13 '10 at 15:40
17
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Convert SQLITE SQL dump file to POSTGRESQL
...le.sql
If you want the id column to "auto increment" then change its type from "int" to "serial" in the table creation line. PostgreSQL will then attach a sequence to that column so that INSERTs with NULL ids will be automatically assigned the next available value. PostgreSQL will also not recogniz...
How to set the prototype of a JavaScript object that has already been instantiated?
...ossible to do: the designation of an objects prototype at runtime separate from its constructor. This is an important use case and is one of the primary reasons __proto__ isn't already dead. It's important enough that it's been a serious discussion point in the formulation of Harmony, or soon to be ...
StringLength vs MaxLength attributes ASP.NET MVC with Entity Framework EF Code First
...cide how large to make a string value field when it creates the database.
From MSDN:
Specifies the maximum length of array
or string data allowed in a property.
StringLength is a data annotation that will be used for validation of user input.
From MSDN:
Specifies the minimum and maximu...
Mutex example / tutorial? [closed]
...std::lock_guard if you want to be exception safe
int i = 0;
void makeACallFromPhoneBooth()
{
m.lock();//man gets a hold of the phone booth door and locks it. The other men wait outside
//man happily talks to his wife from now....
std::cout << i << " Hello Wife" <<...
How to disable all caps menu titles in Visual Studio
...have written an extension which will do this for you.
You can download it from the Visual Studio Gallery:
VSCommands for Visual Studio 2012
VSCommands for Visual Studio 2013
It can also hide main menu altogether and have it appear only on mouse over or alt key press (like in IE)
...
Calling class staticmethod within the class body?
When I attempt to use a static method from within the body of the class, and define the static method using the built-in staticmethod function as a decorator, like this:
...
Build .so file from .c file using gcc command line
...eate the .so file:
gcc hello.o -shared -o libhello.so
EDIT: Suggestions from the comments:
You can use
gcc -shared -o libhello.so -fPIC hello.c
to do it in one step. – Jonathan Leffler
I also suggest to add -Wall to get all warnings, and -g to get debugging information, to your gcc command...
Check if a value is an object in JavaScript
...er all there's no recipe at all!) for checking whether it's an object, far from it. Since people tend to look for something to copy from here without doing any research, I'd highly recommend that they turn to the other, most upvoted (and correct!) answer.
...