Notes, summaries, assignments, exams, and problems for Computers

Sort by
Subject
Level

Client-Side Web Application Development Examples

Classified in Computers

Written on in English with a size of 8.49 KB

Client-Side Web Application Logic

Course Registration Script

This script handles the client-side logic for a course registration form. It fetches available courses, populates a selection dropdown, and processes form submissions to register new entries via an API.

DOM Element Selection and Initialization

The script begins by selecting necessary DOM elements for interaction and notification display.

const init = async function () {
  const selectEl = document.querySelector("select");
  const formEl = document.querySelector("form");
  const notifEl = document.querySelector(".success-notif");
  const errNotifEl = document.querySelector(".fail-notif");

Notification Dismissal Logic

Functionality to close success and error notification boxes is implemented

... Continue reading "Client-Side Web Application Development Examples" »

Karma: 12%
Visits: 0

C++ Code Examples: Essential Algorithms & Programs

Classified in Computers

Written on in English with a size of 5.54 KB

C++ Code Examples: Essential Algorithms & Programs

Here are some fundamental C++ code examples covering various algorithms and programming concepts:

Factorial Calculation

#include <iostream>
using namespace std;

long factorial(int x) {
 int i, f = 1;
 for (i = 1; i <= x; i++) {
 f = f * i;
 }
 return f;
}

int main() {
 int n;
 cout << "Enter the number: ";
 cin >> n;
 if (n < 0) {
 cout << "Factorial is not defined for negative numbers";
 } else {
 cout << "Factorial = " << factorial(n);
 }
 return 0;
}

String Length Finder

#include <iostream>
using namespace std;

int main() {
 int length = 0, i;
 char s[20];
 cout << "Enter the string: ";
 cin.getline(s, 20);
 for (i = 0; s[i] != '\0'
... Continue reading "C++ Code Examples: Essential Algorithms & Programs" »
Karma: 12%
Visits: 0

React Hooks & Redux: Essential Concepts for Developers

Posted by Anonymous and classified in Computers

Written on in English with a size of 10.31 KB

React Hooks and Essential Libraries

useState Hook

Purpose

Purpose: Adds state to functional components.

Import

import { useState } from 'react';

Syntax

const [state, setState] = useState(initialValue);

Update Methods

  • setState(newValue);
  • setState(prevState => ...); (for updates based on previous state)

Example

import React, { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);

  return (
    <div>
      <p>Count: {count}</p>
      <button onClick={() => setCount(count + 1)}>Increment</button>
    </div>
  );
}

useEffect Hook

Purpose

Purpose: Performs side effects such as data fetching, subscriptions, or direct DOM manipulations.

Import

import { useEffect } from 'react';

Syntax

useEffect(
... Continue reading "React Hooks & Redux: Essential Concepts for Developers" »
Karma: 12%
Visits: 0

dsdfs

Classified in Computers

Written on in English with a size of 7.22 KB

Kako si lep danes 

What is Lorem Ipsum?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

What is Lorem Ipsum?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard... Continue reading "dsdfs" »

Karma: 8%
Visits: 0

Programming Concepts: Constants, Constructs, and Operators

Classified in Computers

Written on in English with a size of 1.72 KB

Programming Fundamentals

What is a Constant?

A constant is a data value that remains unchanged during the execution of a program.

Three Programming Constructs

The three fundamental programming constructs are: selection, iteration, and sequence.

Logical Operators

One example of a logical operator is AND.

  • Operator: and
  • Description: Logical AND: True if both operands are true.
  • Syntax: x and y

Functions vs. Procedures

Difference: A function is typically used to calculate a value from a given input, while a procedure is a set of commands executed in a specific order.

Similarity: Functions must return a value, but in stored procedures, it is optional. Procedures can return zero or multiple values. Functions usually have only input parameters, whereas procedures... Continue reading "Programming Concepts: Constants, Constructs, and Operators" »

Karma: 8%
Visits: 0

Java Arithmetic Operations Web App

Classified in Computers

Written on in English with a size of 1.24 KB

Arithmetic Operations in Java

Input Form

Enter number 1:
Enter number 2:
  • Addition
  • Subtraction
  • Multiplication
  • Division

<% String num1Str = request.getParameter("num1"); String num2Str = request.getParameter("num2"); String operation = request.getParameter("operation"); if (num1Str != null && num2Str != null && !num1Str.isEmpty() && !num2Str.isEmpty() && operation != null) { double num1 = Double.parseDouble(num1Str); double num2 = Double.parseDouble(num2Str); double result = 0; switch (operation) { case "add": result = num1 + num2; out.println("

Result: " + result + "

"); break; case "subtract": result = num1 - num2; out.println("

Result: " + result + "

"); break; case "multiply": result = num1 * num2; out.println("... Continue reading "Java Arithmetic Operations Web App" »

Karma: 8%
Visits: 0

Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway

Classified in Computers

Written on in English with a size of 4.69 KB

HOSTàROUTER: 1

ENABLE

CONFIGURE TERMINAL

INTERFACE GIGABITETHERNET 0/0

IP ADDRESS 192.168.1.126 255.255.255.224

NO SHUTDOWN

EXIT

INTERFACE GIGABITEETHERNET 0/1

IP ADDRESS 192.168.1.158 255.255.255.240

NO SHUTDOWN

HOSTàSWITCH 2

ENABLE

CONFIFURE TERMINAL

INTERFACE VLAN 1

IP ADDRESS 192.168.1.157 255.255.255.240

NO SHUTDOWN

HOST/ROUTER 3

EXIT (LLEGAR AL CONFIGURE TERMINAL)

HOSTNAME MIDDLE

ENABLE SECRET CISCO

LINE CONSOLE 0

PASSWORD CLASS

LOGIN

EXIT

SECURITY PASSWORD MIN-LENGTH 10

SERVICE PASSWORD ENCRYPTION

IP DOMAIN-NAME CISCO

CRYPTON KEY GENERATE RSA

1024

EXIT

USERNAME CICLOS

LINE VTY 0 4

LOGIN LOCAL

TRANSPORT INPUT SSH

EXIT

INTERFACE GIBABITEETHERNET 0/0

IPV6 ADDRESS 2001:DB8:ACAD:A::1/64

IPV6 ADDRESS FE80::1 LIN

EXIT

GIBABITETHERNET 0/1

IPV6 ADDRESS 2001:DB8:ACAD:B::1/64

IPV6

... Continue reading "Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway" »
Karma: 8%
Visits: 0

Understanding Computer Viruses and Network Topologies

Classified in Computers

Written on in English with a size of 5.9 KB

A computer virus is a type of computer program that, when executed, replicates itself by modifying other computer programs and inserting its own code.[1] When this replication succeeds, the affected areas are then said to be 'infected' with a computer virus.[2][3]

Virus writers use social engineering deceptions and exploit detailed knowledge of security vulnerabilities to initially infect systems and to spread the virus. The vast majority of viruses target systems running Microsoft Windows,[4][5][6] employing a variety of mechanisms to infect new hosts,[7] and often using complex anti-detection/stealth strategies to evade antivirus software.[8][9][10][11] Motives for creating viruses can include seeking profit (e.g., with ransomware), desire... Continue reading "Understanding Computer Viruses and Network Topologies" »

Karma: 8%
Visits: 0

Content

Classified in Computers

Written on in English with a size of 9.51 KB

Javascript Continued

  1. The document.GetElementById() method returns the DOM node whose id attribute is the same as the method's parameter.
    Ex: document.GetElementById("early_languages") returns the p node in the HTML below.

  2. The document.GetElementsByTagName() method returns an array containing all the DOM nodes whose type is the same as the method's parameter.
    Ex: document.GetElementsByTagName("li") returns a list of the four li nodes from in the HTML below.

  3. The document.GetElementsByClassName() method returns an array containing all the DOM nodes whose class attribute matches the method's parameter.
    Ex: document.GetElementsByClassName("traditional") returns an array containing the ol node with the class attribute matching the word traditional.

... Continue reading "Content" »
Karma: 8%
Visits: 0

Using Proximity, White Space, Alignment, Contrast, and Repetition in Design

Classified in Computers

Written on in English with a size of 1.05 KB

Proximity

Proximity is all about using visual spaces to show relationships in your content. We can group the items in blocks of text or elements in the graphic to take visual emphasis.

White Space

White space, also known as negative space, refers to the spaces between your content, between lines, and even the margins. White space defines and separates different sections.

Alignment

We can separate text boxes, images, etc. by imagining their content as a range inside of a grid. Centering the images to the text and using equal size margins can create a visually pleasing alignment.

Contrast

Contrast means that one item is different from another. We can create contrast using color, size, shape, or contrasting styles of text. Hierarchy, a visual technique... Continue reading "Using Proximity, White Space, Alignment, Contrast, and Repetition in Design" »

Karma: 8%
Visits: 0