Uploaded July 2025 | Updated September 2026, 2 weeks ago
#coding #python #numpy
Broadcasting allows NumPy to perform operations on arrays with different shapes by virtually expanding dimensions, so they match the larger array's shape.
The dimensions have the same size.
OR
One of the dimensions has a size of 1.
#coding #python #numpy
Broadcasting allows NumPy to perform operations on arrays with different shapes by virtually expanding dimensions, so they match the larger array's shape.
The dimensions have the same size.
OR
One of the dimensions has a size of 1.
![Code a simple java shopping cart program in 6 minutes! 🛒
#java #javatutorial #javacourse
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// SHOPPING CART PROGRAM
Scanner scanner = new Scanner(System.in);
String item;
double price;
int quantity;
char currency = $;
double total;
System.out.print(What item would you like to buy?: );
item = scanner.nextLine();
System.out.print(What is the price for each?: );
price = scanner.nextDouble();
System.out.print(How many would you like?: );
quantity = scanner.nextInt();
total = price * quantity;
System.out.println(nYou have bought + quantity + + item +/s);
System.out.println(Your total is + currency + total);
scanner.close();
}
} Code a simple java shopping cart program in 6 minutes! 🛒](https://i.ytimg.com/vi/P8CVPIaRmys/mqdefault.jpg)
![Learn Java anonymous classes in 5 minutes! 🕵️♂️
#java #javatutorial #javacourse
public class Main {
public static void main(String[] args) {
// Anonymous class = A class that doesnt have a name. Cannot be reused.
// Add custom behavior without having to create a new class.
// Often used for one time uses (TimerTask, Runnable, callbacks)
Dog dog1 = new Dog();
Dog dog2 = new Dog(){
@Override
void speak(){
System.out.println(Scooby Doo says *Ruh Roh*);
}
};
dog1.speak();
dog2.speak();
}
}
public class Dog {
void speak(){
System.out.println(The dog goes *woof*);
}
} Learn Java anonymous classes in 5 minutes! 🕵️♂️](https://i.ytimg.com/vi/P_iOnmdww8E/mqdefault.jpg)

![How to WRITE FILES with Java in 8 minutes! ✍
#java #javatutorial #javacourse
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
public class Main {
public static void main(String[] args) {
// How to write a file using Java (4 popular options)
// FileWriter = Good for small or medium-sized text files
// BufferedWriter = Better performance for large amounts of text
// PrintWriter = Best for structured data, like reports or logs
// FileOutputStream = Best for binary files (e.g., images, audio files)
String filePath = test.txt;
String textContent =
Roses are Red
Violets are Blue
BOOTY BOOTY BOOTY
ROCKIN EVERWHERE!
;
try(FileWriter writer = new FileWriter(filePath)){
writer.write(textContent);
System.out.println(File has been written);
}
catch(FileNotFoundException e){
System.out.println(Could not locate file location);
}
catch(IOException e){
System.out.println(Could not write file);
}
}
} How to WRITE FILES with Java in 8 minutes! ✍](https://i.ytimg.com/vi/Pg0aoSbrqOE/mqdefault.jpg)


![Java arithmetic is easy! 🧮
#java #javatutorial #javacourse
public class Main {
public static void main(String[] args) {
// Arithmetic Operators
int x = 10;
int y = 2;
int z;
z = x + y; // ADDITION
z = x - y; // SUBTRACTION
z = x * y; // MULTIPLICATION
z = x / y; // DIVISION
z = x % y; // MODULUS
System.out.println(z);
}
} Java arithmetic is easy! 🧮](https://i.ytimg.com/vi/QAD5unRlCyo/mqdefault.jpg)


![Learn Java 2D arrays in 9 minutes! ⬜
#java #javatutorial #javacourse
public class Main {
public static void main(String[] args){
// 2D array = An array where each element is an array
// Useful for storing a matrix of data
//
// EXAMPLE 1
//
String[][] groceries = {{apple, orange, banana},
{potato, onion, carrot},
{chicken, pork, beef, fish}};
groceries[2][1] = eggs;
for(String[] foods : groceries){
for(String food : foods){
System.out.print(food + );
}
System.out.println();
}
//
// EXAMPLE 2
//
char[][] telephone = {{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
{*, 0, #}};
for(char[] row : telephone){
for(char number : row){
System.out.print(number + );
}
System.out.println();
}
}
} Learn Java 2D arrays in 9 minutes! ⬜](https://i.ytimg.com/vi/Qf3Nczxm2AY/mqdefault.jpg)
![Random numbers in NumPy are easy! 🎲
#coding #python #numpy
Random numbers in NumPy are useful for simulations,
modeling, applying random transformations, and testing purposes.
rng = np.random.default_rng()
print(rng.integers(low=1, high=7, size=(3, 4))) # 3x4 array of Ints
np.random.seed()
print(np.random.uniform(low 1, high=1, size=(3, 2))) # floats between 2 values
# Shuffle
array = np.array([1, 2, 3, 4, 5])
rng.shuffle(array)
print(array)
# Random Choice
fruits = np.array([🍎, 🍊, 🍌, 🥥, 🍍])
print(rng.choice(fruits, size=(3, 3))) Random numbers in NumPy are easy! 🎲](https://i.ytimg.com/vi/Ql5zGPtxlHY/mqdefault.jpg)