There are two ways to define functions with multiple parameters in F#, Curried functions and Tupled functions.
let curriedAdd x y = x + y // Signature: x:int -> y:int -> int
let tupledAdd (x, y) = x + y // Signature: x:int * y:int -> int
All functions defined from outside F# (such as ...
The term 'heap' is a general computing term meaning an area of memory from which portions can be allocated and deallocated independently of the memory provided by the stack.
In C++ the Standard refers to this area as the Free Store which is considered a more accurate term.
Areas of memory allocate...
A std::string containing a number can be converted into an integer type, or a floating point type, using conversion functions.
Note that all of these functions stop parsing the input string as soon as they encounter a non-numeric character, so "123abc" will be converted into 123.
The s...
Arithmetic operations are performed elementwise on Numpy arrays. For arrays of identical shape, this means that the operation is executed between elements at corresponding indices.
# Create two arrays of the same size
a = np.arange(6).reshape(2, 3)
b = np.ones(6).reshape(2, 3)
a
# array([0, 1...
Instantiating a socket can be done in various ways.
by 2 line declaration & instantiation:
First we need to define a variable which will hold a Socket class object:
Socket socket;
then we can create a Socket class object:
socket = new Socket();
We can also make a one line defin...
Installing aws cli in Ubuntu / Debian Instance
sudo apt-get install -y python-dev python-pip
sudo pip install awscli
aws --version
aws configure
Installing aws cli using python
Using pip you can install aws cli in windows, OS X and Linux
sudo pip install awscli
Configuring the AWS Comman...
Unit Test
Unit tests are used to ensure that your code has no syntax error and to test the logic of your code to work as what you expected. Quick example:
src/AppBundle/Calculator/BillCalculator.php
<?php
namespace AppBundle\Calculator;
use AppBundle\Calculator\TaxCalculator;
class Bi...
A subprogram (which defines a procedure), can be either a subroutine or a function; it is said to be an internal subprogram if it is called or invoked from the same program or subprogram that contains it, as follows
program my_program
! declarations
! executable statements,
! among which...
A subprogram is said to be external when it is not contained in the main program, nor in a module or antoher subprogram. In particular it can be defined by means of a programming language other than Fortran.
When an external subprogram is invoked, the compiler cannot access to its code, so all the ...
JSTL is part of the Java EE API and included in Java EE application servers such as WildFly, TomEE, GlassFish, but not in barebones servletcontainers such as Tomcat and Jetty. JSTL are the taglibs which you import from http://java.sun.com/jsp/jstl/* namespace. JSTL must not be confused with a "...
There are various methods available for explicitly converting a string to an integer, such as:
Convert.ToInt16();
Convert.ToInt32();
Convert.ToInt64();
int.Parse();
But all these methods will throw a FormatException, if the input string contains non-numeric characters. For t...
Floating-point numbers cannot represent all real numbers. This is known as floating point inaccuracy.
There are infinitely many floating points numbers and they can be infinitely long (e.g. π), thus being able to represent them perfectly would require infinitely amount of memory. Seeing this was a ...
Objective-C
NSString *textToShare = @"StackOverflow Documentation!! Together, we can do for Documentation what we did for Q&A.";
NSURL *documentationURL = [NSURL URLWithString:@"http://stackoverflow.com/tour/documentation"];
NSArray *objectsToShare = @[textToShare, docum...
Steps to create Hello Spring:
Investigate Spring Boot to see if that would better suit your needs.
Have a project set up with the correct dependencies. It is recommended that you are using Maven or Gradle.
create a POJO class, e.g. Employee.java
create a XML file where you can define your clas...
You can remove any of the conventions defined in the System.Data.Entity.ModelConfiguration.Conventions namespace, by overriding OnModelCreating method.
The following example removes PluralizingTableNameConvention.
public class EshopContext : DbContext
{
public DbSet<Product> Products...
Comparing string in a case insensitive way seems like something that's trivial, but it's not. This section only considers unicode strings (the default in Python 3). Note that Python 2 may have subtle weaknesses relative to Python 3 - the later's unicode handling is much more complete.
The first thi...
Logistic regression is a particular case of the generalized linear model, used to model dichotomous outcomes (probit and complementary log-log models are closely related).
The name comes from the link function used, the logit or log-odds function.
The inverse function of the logit is called the lo...
