Floating point types (float, double and long double) cannot precisely represent some numbers because they have finite precision and represent the values in a binary format. Just like we have repeating decimals in base 10 for fractions such as 1/3, there are fractions that cannot be represented fini...
PREPARE prepares a statement for execution
EXECUTE executes a prepared statement
DEALLOCATE PREPARE releases a prepared statement
SET @s = 'SELECT SQRT(POW(?,2) + POW(?,2)) AS hypotenuse';
PREPARE stmt2 FROM @s;
SET @a = 6;
SET @b = 8;
EXECUTE stmt2 USING @a, @b;
Result:
+------------+
|...
WebGL is a browser technology so there isn't much to set up other than to have a browser. You can get started with WebGL on JSFiddle or Codepen or JSBIn or any number of other sites that let you edit HTML, CSS, and JavaScript online though there will be a few limitations (see below). You can also ho...
The pickle module implements an algorithm for turning an arbitrary Python object into a series of bytes. This process is also called serializing the object. The byte stream representing the object can then be transmitted or stored, and later reconstructed to create a new object with the same charact...
Detailed instructions on getting pymongo set up or installed.
Installing with Pip
To install pymongo for the first time:
pip install pymongo
Installing a specific version of pymongo:
Where X.X.X is the version to be installed
pip install pymongo==X.X.X
Upgrading existing pymon...
Stanford CoreNLP is a popular Natural Language Processing toolkit supporting many core NLP tasks.
To download and install the program, either download a release package and include the necessary *.jar files in your classpath, or add the dependency off of Maven central. See the download page for mor...
Whitespace is handled by the lexical analyzer before being parsed.
The lexical analyzer uses a stack to store indentation levels. At the beginning, the stack contains just the value 0, which is the leftmost position. Whenever a nested block begins, the new indentation level is pushed on the stack, ...
Creating a custom directive with isolated scope will separate the scope inside the directive from the outside scope, in order to prevent our directive from accidentally change the data in the parent scope and restricting it from reading private data from the parent scope.
To create an isolated scop...
Python has several functions built into the interpreter.
If you want to get information of keywords, built-in functions, modules or topics open a Python console and enter:
>>> help()
You will receive information by entering keywords directly:
>>> help(help)
or within the u...
Mongoose populate is used to show data for referenced documents from other collections.
Lets say we have a Person model that has referenced documents called Address.
Person Model
var Person = mongoose.model('Person', {
fname: String,
mname: String,
lname: String,
address: {typ...
First, references will be added to the CLR assemblies that will be used.
import clr
clr.AddReference('System.Windows.Forms')
Next the names we will use are imported.
from System.Windows.Forms import Application, Form
A class will be created for the Hello World form using Form as its subclas...
Threads are the low level parts of a computing system which command processing occurs. It is supported/provided by CPU/MCU hardware. There are also software methods. The purpose of multi-threading is doing calculations in parallel to each other if possible. Thus the desired result can be obtained in...
This example shows a minimal Mockito test using a mocked ArrayList:
import static org.mockito.Mockito.*;
import static org.junit.Assert.*;
import java.util.ArrayList;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRu...
Components are simply instances that implement the Ashley component class.
import com.badlogic.ashley.core.Component;
import com.badlogic.ashley.core.ComponentMapper;
public class Position implements Component {
public static final ComponentMapper<Position> Map =
...
