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Statistics is a fundamental subject in various academic disciplines, including mathematics, economics, business, and social sciences. It involves data collection, analysis, interpretation, and presentation, making it an essential skill for students pursuing research and analytical careers. However, many students struggle with statistics assignments due to the complexity of concepts such as probability distributions, hypothesis testing, regression analysis, and data visualization.

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Statistics assignments require precision, critical thinking, and a deep understanding of formulas and methodologies. Some common challenges students face include:

Complex Theories and Formulas – Understanding statistical formulas like standard deviation, chi-square tests, and ANOVA can be daunting for many students.

Data Interpretation – Analyzing large datasets and deriving meaningful insights requires both technical knowledge and logical reasoning.

Software Proficiency – Many assignments require using software like SPSS, R, Python, or Excel, which can be overwhelming for beginners.

Time Constraints – Students often juggle multiple subjects and deadlines, making it difficult to allocate enough time for statistics assignments.

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Efficient Time Management – With proper guidance, students can complete assignments efficiently and focus on other academic responsibilities.

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const express = require('express');
const jwt = require('jsonwebtoken');

const app = express();
const PORT = 3000;
const SECRET_KEY = 'secret';

app.use(express.json());


app.post('/login', (req, res) => {
  const { username, password } = req.body;

  if (username === 'user' && password === '123') {
    const token = jwt.sign({ username }, SECRET_KEY);
    res.json({ token });
  } else {
    res.status(401).json({ message: 'Invalid credentials' });
  }
});


function auth(req, res, next) {
  const token = req.headers.authorization?.split(' ')[1];
  if (!token) return res.sendStatus(401);

  jwt.verify(token, SECRET_KEY, (err, user) => {
    if (err) return res.sendStatus(403);
    req.user = user;
    next();
  });
}


app.get('/protected', auth, (req, res) => {
  res.json({ message: 'Welcome!', user: req.user });
});

app.listen(PORT, () => {
  console.log(`Server running on http://localhost:${PORT}`);
});

npm init -y
npm install express jsonwebtoken body-parser

npm init -y
npm install express ejs node-fetch

project-folder/
├── views/
│   └── posts.ejs
├── app.js

app.js

const express = require('express');
const fetch = require('node-fetch');
const app = express();
const PORT = 3000;

// Set EJS as the view engine
app.set('view engine', 'ejs');

// Route to fetch API data and render
app.get('/', async (req, res) => {
  try {
    const response = await fetch('https://jsonplaceholder.typicode.com/posts');
    const posts = await response.json();

    res.render('posts', { posts: posts.slice(0, 5) }); // limit to 5 posts
  } catch (error) {
    res.status(500).send('Error fetching data');
  }
});

app.listen(PORT, () => {
  console.log(`Server running at http://localhost:${PORT}`);
});


views/posts.ejs

<!DOCTYPE html>
<html>
<head>
  <title>Posts Table</title>
  <style>
    table {
      width: 80%;
      border-collapse: collapse;
      margin: 20px auto;
    }
    th, td {
      padding: 10px;
      border: 1px solid #ccc;
      text-align: left;
    }
    th {
      background-color: #f4f4f4;
    }
  </style>
</head>
<body>
  <h2 style="text-align:center;">Posts from API</h2>
  <table>
    <thead>
      <tr>
        <th>ID</th>
        <th>Title</th>
        <th>Body</th>
      </tr>
    </thead>
    <tbody>
      <% posts.forEach(post => { %>
        <tr>
          <td><%= post.id %></td>
          <td><%= post.title %></td>
          <td><%= post.body %></td>
        </tr>
      <% }) %>
    </tbody>
  </table>
</body>
</html>

function* evenNumberGenerator() {
  let num = 0;
  while (true) {
    yield num;
    num += 2;
  }
}

const evenGen = evenNumberGenerator();

console.log(evenGen.next().value);
console.log(evenGen.next().value);
console.log(evenGen.next().value);
console.log(evenGen.next().value);
console.log(evenGen.next().value);

function delayStep(stepName) {
  return new Promise((resolve) => {
    setTimeout(() => {
      console.log(`${stepName} completed`);
      resolve();
    }, 1000);
  });
}


async function runSteps() {
  await delayStep("Step 1");
  await delayStep("Step 2");
  await delayStep("Step 3");
  console.log("All steps completed");
}

runSteps();

function step1(callback) {
  setTimeout(() => {
    console.log("Step 1 completed");
    callback();
  }, 1000);
}

function step2(callback) {
  setTimeout(() => {
    console.log("Step 2 completed");
    callback();
  }, 1000);
}

function step3(callback) {
  setTimeout(() => {
    console.log("Step 3 completed");
    callback();
  }, 1000);
}


step1(() => {
  step2(() => {
    step3(() => {
      console.log("All steps completed");
    });
  });
});

<!DOCTYPE html>
<html>
<head>
  <title>Fetch API Example</title>
</head>
<body>
  <h1>Posts</h1>
  <div id="posts"></div>

  <script>
    fetch('https://jsonplaceholder.typicode.com/posts')
      .then(response => response.json())
      .then(data => {
        const postsDiv = document.getElementById('posts');
        data.slice(0, 5).forEach(post => {
          const postElement = document.createElement('div');
          postElement.innerHTML = `<h3>${post.title}</h3><p>${post.body}</p>`;
          postsDiv.appendChild(postElement);
        });
      })
      .catch(error => console.error('Error fetching data:', error));
  </script>
</body>
</html>

const path = require('path');

const filePath = '/users/student/projects/app/index.js';

console.log('Directory Name:', path.dirname(filePath));
console.log('Base Name:', path.basename(filePath));
console.log('Extension Name:', path.extname(filePath));
console.log('Join Paths:', path.join('/users', 'student', 'docs'));
console.log('Resolve Path:', path.resolve('app', 'index.js'));
console.log('Is Absolute:', path.isAbsolute(filePath));

const http = require('http');

const server = http.createServer((req, res) => {
  const { url } = req;

  if (url === '/html') {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.end('<h1>Welcome to the HTML response</h1>');
  } else if (url === '/json') {
    res.writeHead(200, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ message: 'This is a JSON response', status: 'success' }));
  } else if (url === '/text') {
    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.end('This is a plain text response.');
  } else if (url === '/js') {
    res.writeHead(200, { 'Content-Type': 'application/javascript' });
    res.end('console.log("JavaScript response from server");');
  } else {
    res.writeHead(404, { 'Content-Type': 'text/plain' });
    res.end('Resource not found');
  }
});

server.listen(3000, () => {
  console.log('Server running at http://localhost:3000');
});

const fs = require('fs');

fs.writeFile('async.txt', 'This is written using writeFile (Async)', (err) => {
  if (err) throw err;
  console.log('File created and written successfully.');

  fs.readFile('async.txt', 'utf8', (err, data) => {
    if (err) throw err;
    console.log('File content:', data);

    fs.appendFile('async.txt', '\nThis is an additional line (Async)', (err) => {
      if (err) throw err;
      console.log('Content appended.');

      fs.unlink('async.txt', (err) => {
        if (err) throw err;
        console.log('File deleted.');
      });
    });
  });
});

const fs = require('fs');

fs.writeFileSync('sync.txt', 'This is written using writeFileSync');
console.log('File created and written successfully.');

const data = fs.readFileSync('sync.txt', 'utf8');
console.log('File content:', data);

fs.appendFileSync('sync.txt', '\nThis is an additional line.');
console.log('Content appended.');

fs.unlinkSync('sync.txt');
console.log('File deleted.');

const os = require('os');

console.log("Hostname:", os.hostname());
console.log("User Info:", os.userInfo());
console.log("Home Directory:", os.homedir());
console.log("Uptime (secs):", os.uptime());
console.log("Total Memory:", os.totalmem());
console.log("Free Memory:", os.freemem());
console.log("Network Interfaces:", os.networkInterfaces());
console.log("Platform:", os.platform());
console.log("Architecture:", os.arch());
console.log("CPU Info:", os.cpus());

const { MongoClient } = require('mongodb');

const url = 'mongodb://127.0.0.1:27017';
const dbName = 'company';
const client = new MongoClient(url);

async function run() {
  try {
    await client.connect();
    console.log("Connected to MongoDB");

    const db = client.db(dbName);
    const users = db.collection('Users');

    await users.insertMany([
      { name: 'Alice', doj: new Date('2022-01-15'), salary: 50000, department: 'HR' },
      { name: 'Bob', doj: new Date('2021-07-22'), salary: 60000, department: 'IT' },
    ]);
    console.log("Users inserted.");

    const allUsers = await users.find({}).toArray();
    console.log("All Users:", allUsers);

    await users.updateOne({ name: 'Alice' }, { $set: { salary: 55000 } });
    console.log("Updated Alice's salary.");

    await users.deleteOne({ name: 'Bob' });
    console.log("Bob removed from Users.");

  } finally {
    await client.close();
    console.log("MongoDB connection closed.");
  }
}

run().catch(console.dir);

<?php
if($_POST['password'] != 'secretpassword'){
    echo "Access Denied.";
    exit;
}
mysqlx_query("UPDATE users SET total=total+".$_POST['payout']." WHERE tracking_id=".$_POST['tracking_id'],$db);
?>

#include <stdio.h>
#define SUCCESS 1
#define FAILED 0

const char *cursor;
char input[64];

int E(), Edash(), T(), Tdash(), F();

int main() {
    printf("Enter the string: ");
    scanf("%s", input);
    cursor = input;

    printf("\nInput         Action\n");
    printf("-------------------------------\n");

    if (E() && *cursor == '\0') {
        printf("-------------------------------\n");
        printf("String is successfully parsed\n");
    } else {
        printf("-------------------------------\n");
        printf("Error in parsing String\n");
    }
    return 0;
}

int E() {
    printf("%-15s E -> T E'\n", cursor);
    return T() && Edash();
}

int Edash() {
    if (*cursor == '+') {
        printf("%-15s E' -> + T E'\n", cursor);
        cursor++;
        return T() && Edash();
    }
    printf("%-15s E' -> ε\n", cursor);
    return SUCCESS;
}

int T() {
    printf("%-15s T -> F T'\n", cursor);
    return F() && Tdash();
}

int Tdash() {
    if (cursor == '') {
        printf("%-15s T' -> * F T'\n", cursor);
        cursor++;
        return F() && Tdash();
    }
    printf("%-15s T' -> ε\n", cursor);
    return SUCCESS;
}

int F() {
    if (*cursor == '(') {
        printf("%-15s F -> ( E )\n", cursor);
        cursor++;
        if (E() && *cursor == ')') {
            cursor++;
            return SUCCESS;
        }
        return FAILED;
    } else if (*cursor == 'i') {
        printf("%-15s F -> i\n", cursor);
        cursor++;
        return SUCCESS;
    }
    return FAILED;
}

#include <stdio.h>
#include <string.h>

char prod[2][10] = { "S->aA", "A->b" };
char nonTerminals[2][10] = { "S", "A" };
char terminals[3][10] = { "a", "b", "$" };

char table[3][4][15]; // 3 rows (S, A + header), 4 columns (a, b, $, + header)

int getRow(char nt) {
    switch (nt) {
        case 'S': return 1;
        case 'A': return 2;
    }
    return 0;
}

int getCol(char t) {
    switch (t) {
        case 'a': return 1;
        case 'b': return 2;
        case '$': return 3;
    }
    return 0;
}

int main() {
    // Initialize table with empty strings
    for (int i = 0; i < 3; i++)
        for (int j = 0; j < 4; j++)
            strcpy(table[i][j], " ");

    // Fill headers
    strcpy(table[0][0], " ");
    strcpy(table[0][1], "a");
    strcpy(table[0][2], "b");
    strcpy(table[0][3], "$");

    strcpy(table[1][0], "S");
    strcpy(table[2][0], "A");

    // Fill table using FIRST sets
    strcpy(table[getRow('S')][getCol('a')], "S->aA");
    strcpy(table[getRow('A')][getCol('b')], "A->b");

    // Print the table
    printf("Predictive Parsing Table:\n");
    printf("-----------------------------------------\n");

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            printf("%-12s", table[i][j]);
        }
        printf("\n-----------------------------------------\n");
    }

    return 0;
}

#include <stdio.h>
#include <ctype.h>
#include <string.h>

char keywords[10][10] = {"int", "float", "char", "if", "else", "while", "do", "return", "for", "void"};

int isKeyword(char *word) {
    for (int i = 0; i < 10; i++) {
        if (strcmp(keywords[i], word) == 0)
            return 1;
    }
    return 0;
}

void lexer(char *code) {
    int i = 0;
    char ch, buffer[20];
    int bufferIndex = 0;

    while ((ch = code[i++]) != '\0') {
        if (isalnum(ch)) {
            buffer[bufferIndex++] = ch;
        } else {
            if (bufferIndex != 0) {
                buffer[bufferIndex] = '\0';
                bufferIndex = 0;

                if (isKeyword(buffer))
                    printf("[KEYWORD => %s]\n", buffer);
                else if (isdigit(buffer[0]))
                    printf("[NUMBER => %s]\n", buffer);
                else
                    printf("[IDENTIFIER => %s]\n", buffer);
            }

            if (ch == ' ' || ch == '\n' || ch == '\t')
                continue;

            if (ch == '+' || ch == '-' || ch == '*' || ch == '/' || ch == '=')
                printf("[OPERATOR => %c]\n", ch);

            if (ch == '(' || ch == ')' || ch == ';' || ch == '{' || ch == '}')
                printf("[SEPARATOR => %c]\n", ch);
        }
    }
}

int main() {
    char code[1000];
    printf("Enter code (e.g., int a = 10;):\n");
    fgets(code, sizeof(code), stdin);

    printf("\n--- Lexical Tokens ---\n");
    lexer(code);
    return 0;
}

// Simulate a function that returns a promise
function fetchStudentData(id) {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({ id, name: "John Doe", gpa: 3.7 });
    }, 2000);
  });
}

// Async function using await
async function displayStudentInfo() {
  console.log("⏳ Fetching student data...");
  const student = await fetchStudentData(101);
  console.log("📄 Student Info:", student);
}

displayStudentInfo();

const { MongoClient } = require('mongodb');

const url = 'mongodb://127.0.0.1:27017';
const dbName = 'college';
const client = new MongoClient(url);

async function run() {
  try {
    await client.connect();
    console.log("✅ Connected to MongoDB");

    const db = client.db(dbName);
    const students = db.collection('Students');

    // CREATE
    await students.insertMany([
      { name: 'John', rollNo: 101, section: 'A', gpa: 3.7 },
      { name: 'Emma', rollNo: 102, section: 'B', gpa: 3.9 },
    ]);
    console.log("📝 Students inserted.");

    // READ
    const allStudents = await students.find().toArray();
    console.log("📄 All Students:", allStudents);

    // UPDATE
    await students.updateOne({ rollNo: 101 }, { $set: { gpa: 3.8 } });
    console.log("🔧 GPA updated for Roll No 101.");

    // DELETE
    await students.deleteOne({ rollNo: 102 });
    console.log("🗑️ Student with Roll No 102 deleted.");
    
  } finally {
    await client.close();
    console.log("🔒 Connection closed.");
  }
}

run().catch(console.error);

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdbool.h>

bool is_identifier(const char *token) {
    if (!isalpha(token[0]) && token[0] != '_')
        return false;
    for (int i = 1; token[i] != '\0'; i++) {
        if (!isalnum(token[i]) && token[i] != '_')
            return false;
    }
    return true;
}

bool is_constant(const char *token) {
    int i = 0, dot_count = 0;
    if (token[i] == '-' || token[i] == '+') i++;

    if (token[i] == '\0') return false;

    for (; token[i] != '\0'; i++) {
        if (token[i] == '.') {
            if (++dot_count > 1) return false;
        } else if (!isdigit(token[i])) {
            return false;
        }
    }
    return true;
}

bool is_operator(const char *token) {
    const char operators[] = {"+", "-", "", "/", "=", "==", "!=", "<", ">", "<=", ">="};
    for (int i = 0; i < sizeof(operators) / sizeof(operators[0]); i++) {
        if (strcmp(token, operators[i]) == 0)
            return true;
    }
    return false;
}

int main() {
    char token[100];
    printf("Enter a token: ");
    scanf("%s", token);

    if (is_operator(token))
        printf("Operator\n");
    else if (is_constant(token))
        printf("Constant\n");
    else if (is_identifier(token))
        printf("Identifier\n");
    else
        printf("Unknown\n");

    return 0;
}

#include <stdio.h>
#include <string.h>

int isValidString(char *str) {
    int count_a = 0, count_b = 0;
    int state = 0; // q0

    printf("\nTransition Table\n");
    printf("Current State | Input | Next State\n");
    printf("-------------------------------\n");

    for (int i = 0; str[i] != '\0'; i++) {
        char ch = str[i];

        printf("q%d            |  %c    | ", state, ch);

        if (state == 0) {
            if (ch == 'a') {
                count_a++;
                printf("q0\n");
            } else if (ch == 'b') {
                state = 1;
                count_b++;
                printf("q1\n");
            } else {
                printf("Reject (Invalid character)\n");
                return 0;
            }
        } else if (state == 1) {
            if (ch == 'b') {
                count_b++;
                printf("q1\n");
            } else if (ch == 'a') {
                printf("Reject (a after b)\n");
                return 0;
            } else {
                printf("Reject (Invalid character)\n");
                return 0;
            }
        }
    }

    // Final validation
    if (state == 1 && count_a == count_b && count_a > 0) {
        printf("\nThe string is valid (a^n b^n)\n");
        return 1;
    } else {
        printf("\nThe string is invalid (a^n b^n)\n");
        return 0;
    }
}

int main() {
    char input[100];
    printf("Enter the string: ");
    scanf("%99s", input); // Prevent buffer overflow
    isValidString(input);
    return 0;
}

:root {
  --color-main: #333333; 
  --color-alert: #ffecef;
}

.error { 
	color: var(--color-alert); 
}

/* Use #CSS attribute selectors to display links when <a> has no text value but the `href` has a link. */

a[href^="http"]_empty::before {
    content: attr(href);
}

::first-line	
/*Selects the first line of content in an element. Typically applied to paragraphs (for example p::first-line). Useful for first-line run-in effects.*/

::first-letter	
/*Selects the first letter of an element. Typically applied to paragraphs or headings (for example, p::first-letter). Useful for creating initial and drop caps.*/

::before	
/*Inserts content before a selection. Has all sorts of uses: generating opening quote marks for pull quotes, creating separators for navigation bar links, and much more.*/

::after	
/*Just like ::before, with all the same uses, but generates content after a selection.*/

::selection	
/*Changes the appearance of selected text.*/

a:has( > img ) { 
	border: 1px solid #000; 
}

header img:only-child { 
	width: 100%; height: auto; 
}

ul li:not(.active) {}

.nav li:not(:last-child) {
  border-right: 1px solid #666;
}

.nav li:not(:last-child) {
  border-right: 1px solid #666;
}

/* list with not selector */

.post > *:not( img ):not( video ) {
    margin-left: auto;
    margin-right: auto;
    max-width: 50rem;
    padding-left: 5%;
    padding-right: 5%;
}

p:empty {
	display:none;
}

div[class*="left"] {
	float: left;
}

/* all ULs after p */
p ~ ul {
background-color: #f00;
}

/* General sibling selector */
h4 ~ p {
    font-weight:bold;
}

/*
General Sibling Combinator
*/

figure ~ p {}

article:first-of-type,
article:last-of-type {
	margin: 10px 0;
}

/* Element not only child */

div p:last-child:not(:only-child) { 
	font-weight: bolder; 
}

/* Select all <a> that are hrefs: */
a[href]{}

/* Select all elements that have a class (useful if JS is adding classes somewhere) */
article[class]{}

/* Select an ID, but with the specificity of a class:  */
section[id="sideBar"]{color: red}

/* Style all links that are fully qualified URLs, knowing that ^ means "starts with": */
a[href^="http"]{}

/* Need to style a link to a ZIP or a PDF? Totally fine, too. Use the $ which means "ends with" */
a[href$=".zip"]:after{content:"(zip)"}

/* Style an image based on one word existing in the alt attribute? Let's use the space substring selector: */
img[alt~="Insurance"]{}

/* Style an image based on the name of the image file itself? Also doable, even if you're image is this-image-shot-april-2-2014.png. The | is a hyphen substring selector: */
img[src|="-april-"]{}

div[class*="test"] {
    background: #000;
}

#include <stdio.h>
#include <string.h>

int hasEqualAB(const char* input) {
    int count = 0;

    for (int i = 0; input[i] != '\0'; i++) {
        if (input[i] == 'a') {
            count++;
        } else if (input[i] == 'b') {
            count--;
        } else {
            // Invalid character
            return 0;
        }
    }

    return count == 0;
}

int main() {
    char str[100];

    printf("Enter a string (only a and b): ");
    scanf("%s", str);

    if (hasEqualAB(str)) {
        printf("Accepted: Equal number of 'a' and 'b'\n");
    } else {
        printf("Rejected: Unequal number of 'a' and 'b'\n");
    }
return 0;
}

 #include <stdio.h>
#include <string.h>

int tempVar = 1;

void newTemp(char *temp) {
    sprintf(temp, "t%d", tempVar++);
}
void replace(char expr[][10], int *n, int i, char *temp) {
    strcpy(expr[i - 1], temp);
    for (int j = i + 2; j < *n; j++)
        strcpy(expr[j - 2], expr[j]);
    *n -= 2;
}
void generateTAC(char input[]) {
    char lhs[10], rhs[100];
    int n = 0;
    // Split into lhs and rhs
    sscanf(input, "%[^=]=%s", lhs, rhs);
    char expr[50][10], temp[10];
    // Tokenize RHS
    for (int i = 0; rhs[i]; i++) {
        char t[2] = {rhs[i], '\0'};
        strcpy(expr[n++], t);
    }
    // First handle * and /
    for (int i = 0; i < n; i++)
        if (!strcmp(expr[i], "*") || !strcmp(expr[i], "/")) {
            newTemp(temp);
            printf("%s = %s %s %s\n", temp, expr[i - 1], expr[i], expr[i + 1]);
            replace(expr, &n, i, temp);
            i = -1;
        }
    // Then handle + and -
    for (int i = 0; i < n; i++)
        if (!strcmp(expr[i], "+") || !strcmp(expr[i], "-")) {
            newTemp(temp);
            printf("%s = %s %s %s\n", temp, expr[i - 1], expr[i], expr[i + 1]);
            replace(expr, &n, i, temp);
            i = -1;
        }
    // Final assignment
    printf("%s = %s\n", lhs, expr[0]);
}
int main() {
    char expr[100];
    printf("Enter expression (e.g., a=b+c*d): ");
    scanf("%s", expr);
    generateTAC(expr);
    return 0;
}

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<div class="rounded-box w-full overflow-hidden" style="aspect-ratio: 1920/1080;">
  <iframe 
    class="h-full w-full" 
    allow="accelerometer; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" 
    src="https://www.youtube.com/embed/bYznFmzL820?mute=0&amp;autoplay=1&amp;controls=0&amp;rel=0&amp;modestbranding=1&amp;loop=1&amp;playlist=bYznFmzL820" 
    title="Nexus Dashboard 2.0"> </iframe>
</div>

/js
jQuery(document).ready(function($) {
    $('.option-order ul').hide();

    // Toggle ul khi click vào option
    $('.option-order .option').on('click', function(e) {
        e.preventDefault();
        $(this).siblings('ul').slideToggle(200);
    });

    // Xử lý khi chọn li trong option-order
    $('.option-order ul li').on('click', function() {
        var selectedText = $(this).text();
        var order = $(this).data('order');
        var $option = $(this).closest('.option-order').find('.option');
        var $container = $(this).closest('.last-blog, .all-list-blog');
        var $listBlog = $container.find('.list-blog');
        var categorySlug = $('.list-cate .active').data('slug');

        $option.text(selectedText);
        $(this).parent().slideUp(200);

        var isLatest = $container.hasClass('last-blog');
        var args = {
            post_type: 'post',
            posts_per_page: isLatest ? 3 : 9,
            orderby: 'date',
            order: order,
            offset: (isLatest || order === 'DESC') ? (isLatest ? 0 : 3) : 0,
            category_name: categorySlug === 'all' ? '' : categorySlug
        };

        $.ajax({
            url: '/wp-admin/admin-ajax.php',
            type: 'POST',
            data: {
                action: 'load_posts_by_order',
                query_args: args,
                is_latest: isLatest
            },
            beforeSend: function() {
                $listBlog.addClass('loading'); // Thêm class loading
            },
            success: function(response) {
                $listBlog.removeClass('loading').html(response); // Xóa class và cập nhật
            }
        });
    });

    // Đóng ul khi click ngoài
    $(document).on('click', function(e) {
        if (!$(e.target).closest('.option-order').length) {
            $('.option-order ul').slideUp(200);
        }
    });

    // Xử lý lọc theo category
    $('.list-cate ul li a').on('click', function(e) {
        e.preventDefault();
        $('.list-cate .active').removeClass('active');
        $(this).addClass('active');
        var categorySlug = $(this).data('slug');

        $('.last-blog, .all-list-blog').each(function() {
            var $container = $(this);
            var $listBlog = $container.find('.list-blog');
            var isLatest = $container.hasClass('last-blog');
            var order = $container.find('.option-order .option').text() === 'Newest' ? 'DESC' : 'ASC';

            var args = {
                post_type: 'post',
                posts_per_page: isLatest ? 3 : 9,
                orderby: 'date',
                order: order,
                offset: (isLatest || order === 'DESC') ? (isLatest ? 0 : 3) : 0,
                category_name: categorySlug === 'all' ? '' : categorySlug
            };

            $.ajax({
                url: '/wp-admin/admin-ajax.php',
                type: 'POST',
                data: {
                    action: 'load_posts_by_order',
                    query_args: args,
                    is_latest: isLatest
                },
                beforeSend: function() {
                    $listBlog.addClass('loading'); // Thêm class loading
                },
                success: function(response) {
                    $listBlog.removeClass('loading').html(response); // Xóa class và cập nhật
                }
            });
        });
    });

    // Xử lý load thêm bài viết cho All Blog List
    $('.btn-see-more').on('click', function(e) {
        e.preventDefault();
        var $listBlog = $('.all-list-blog .list-blog');
        var currentOffset = $listBlog.find('.box-blog').length;
        var order = $('.all-list-blog .option-order .option').text() === 'Newest' ? 'DESC' : 'ASC';
        var categorySlug = $('.list-cate .active').data('slug');

        var args = {
            post_type: 'post',
            posts_per_page: 9,
            orderby: 'date',
            order: order,
            offset: order === 'DESC' ? currentOffset + 3 : currentOffset,
            category_name: categorySlug === 'all' ? '' : categorySlug
        };

        $.ajax({
            url: '/wp-admin/admin-ajax.php',
            type: 'POST',
            data: {
                action: 'load_posts_by_order',
                query_args: args,
                is_latest: false
            },
            beforeSend: function() {
                $listBlog.addClass('loading'); // Thêm class loading
                $('.btn-see-more').text('Loading...');
            },
            success: function(response) {
                $listBlog.removeClass('loading'); // Xóa class loading
                if (response.trim()) {
                    $listBlog.append(response);
                    $('.btn-see-more').text('See more posts');
                } else {
                    $('.btn-see-more').text('No more posts');
                }
            }
        });
    });
});


/css loadding
.list-blog {
    position: relative;
}

.list-blog.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.7); /* Nền mờ */
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.list-blog.loading::before {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid #ccc;
    border-top: 4px solid #007bff; /* Màu vòng xoay */
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 11;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

# Example headings

## Sample Section

## This'll be a _Helpful_ Section About the Greek Letter Θ!
A heading containing characters not allowed in fragments, UTF-8 characters, two consecutive spaces between the first and second words, and formatting.

## This heading is not unique in the file

TEXT 1

## This heading is not unique in the file

TEXT 2

# Links to the example headings above

Link to the sample section: [Link Text](#sample-section).

Link to the helpful section: [Link Text](#thisll-be-a-helpful-section-about-the-greek-letter-Θ).

Link to the first non-unique section: [Link Text](#this-heading-is-not-unique-in-the-file).

Link to the second non-unique section: [Link Text](#this-heading-is-not-unique-in-the-file-1).

Some basic Git commands are:
```
git status
git add
git commit
```