Programming Articles - Page 2737 of 3363

What is phyllotaxis pattern?When we go back, in our botany classes and the plant world, phyllotaxis means the arrangement of flowers, leaves or seeds on a plant stem, similar to the one found in Fibonacci spiral. Based on Fibonacci sequence, the Fibonacci spiral is a set of numbers that follows a pattern similar on pascal’s triangle. The Fibonacci sequence numbers are something like - 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, etc. So the Fibonacci sequence number is the sum of its previous numbers.Fibonacci spiralsWe generally look for symmetry and patterns to understand the objects ... Read More

In this we are going to write python program which is going to analyse the images taken from the webcam and try to detect the movement and store the time-interval of the webcam video in a csv file.Required LibraryWe are going to use the OpenCV & pandas library for that. If it’s not already installed, you can install it using pip, with something like:$pip install opencv2, pandasExample Code#Import required libraries import cv2 import pandas as pd import time from datetime import datetime #Initialise variables stillImage = None motionImage = [ None, None ] time = [] # Initializing ... Read More

If you want to remove an element from the AbstractCollection classs, use the remove() method. It returns TRUE if the elements requested to be removed is successfully removed from the collection.The syntax is as follows:public boolean remove(Object ob)Here, ob is the element to be removed the from this Collection. Whereas, the class Object is the root of the class hierarchy.To work with AbstractCollection class in Java, import the following package:import java.util.AbstractCollection;The following is an example to implement AbstractCollection remove() method in Java:Example Live Demoimport java.util.Iterator; import java.util.ArrayList; import java.util.AbstractCollection; public class Demo {    public static void main(String[] args) {   ... Read More

Git is the most popular version control system, where millions of developers manage their project or files (code). In this we will try to fetch top 10 most starred repositories within a month.As we are mainly scraping the GitHub repositories, we are going to use mainly the, Requests & BeautifulSoup library to fetch the repositories.We will store the result in a file & display it. It will show the result based on position (stars) with name & repos.Below is the code to implement it:import requests from bs4 import BeautifulSoup r = requests.get('https://github.com/trending/lua?since=monthly') bs = BeautifulSoup(r.text, 'lxml') lista_repo = bs.find_all('ol', class_='repo-list') ... Read More

The merge() method of the StringJoiner class in Java 8 is used to merge the contents of the StringJoiner str, which is passed as a parameter. The content gets added as the next element.The syntax is as follows:public StringJoiner merge(StringJoiner str)Here, str is the StringJoiner content to be merged.To work with the StringJoiner in Java 8, import the following package:import java.util.StringJoiner;The following is an example to implement StringJoiner merge() method in Java:Example Live Demoimport java.util.StringJoiner; public class Demo {    public static void main(String[] args) {       // StringJoiner 1       StringJoiner strJoin1 = new StringJoiner(" "); ... Read More

To insert element into the stream, you need to use the add() method of the IntStream.Builder.The syntax is as follows:default IntStream.Builder add(int t)Here, parameter t is the element to be inserted.Declare IntStream.Builder:IntStream.Builder builder = IntStream.builder();Add some elements to the Builder using add() method:builder.add(10); builder.add(25); builder.add(33); builder.add(42);The following is an example to implement IntStream.Builder add() method in JavaExample Live Demoimport java.util.stream.IntStream; public class Demo {    public static void main(String[] args) {       IntStream.Builder builder = IntStream.builder();       System.out.println("Elements in the stream...");       builder.add(10);       builder.add(25);       builder.add(33);       builder.add(42); ... Read More

Insert an element into IntStream using the IntStream.Builder accept() method. It adds element to the stream being built.The syntax is as follows:void accept(int t)Here, parameter t is the input argument.The elements are inserted as shown below in the stream:builder.accept(10); builder.accept(15); builder.accept(25); builder.accept(39); builder.accept(45);The following is an example to implement IntStream.Builder accept() method in Java:Example Live Demoimport java.util.stream.IntStream; public class Demo {    public static void main(String[] args) {       IntStream.Builder builder = IntStream.builder();       System.out.println("Elements of the stream...");       builder.accept(10);       builder.accept(15);       builder.accept(25);       builder.accept(39);       ... Read More

A British mathematician in an around 1970 created his “Game of Life” – which are basically a set of rules depicting the chaotic yet patterned growth of a colony of biological organisms. The “Game of Life” is a two-dimensional grid consists of “living” and “dead” cells.Rules of Game of lifeOverpopulation: A cell dies(off) if its surrounded by more than three living cells.Static: A cell lives(on) if its surrounded by two or three living cells.Underpopulation: A cell dies(off) if its surrounded by fewer than two living cells.Reproduction: A cell becomes live(on) if a dead cell is surrounded by exactly three cells. Cell ... Read More

To convert Primitive Array to Stream, you need to use the of() method.Let’s say the following is our Primitive Array:int[] myArr = new int[] { 20, 50, 70, 90, 100, 120, 150 };Now, use the of() method to convert the primitive array to stream:IntStream stream = IntStream.of(myArr);The following is an example to convert primitive array to stream in Java:Example Live Demoimport java.util.stream.IntStream; import java.util.*; public class Main {    public static void main(String[] args) {       int[] myArr = new int[] { 20, 50, 70, 90, 100, 120, 150 };       System.out.println("The Primitive Array = "+Arrays.toString(myArr));   ... Read More

NodeJs and Python are two main preferred languages among developers and web designers. But there are couple of areas where NodeJs fall short of python are numerical and scientic computation (AI, Machine learning, deep learning etc.). Whereas python provides lots of libraries to work with scientific computing lot easier.Luckly, we can utilise the python libraries within our nodejs application by running python in the background and return back the result.For this we are going to use the child_process standard library of NodeJs to spawn a pyton process in the background, do computation and return back the result to our node ... Read More