JAVASCRIPT PROGRAMMING
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// 1. push()
let arrPush = [1, 2, 3];
arrPush.push(4, 5);
console.log(arrPush); // Output: [1, 2, 3, 4, 5]
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class MorseCodeCipher {
  constructor() {
    // This is a JavaScript implementation of MorseCode Cipher
    this.morse_dict = {
      'A': '.-', 'B': '-...',
      'C': '-.-.', 'D': '-..', 'E': '.',
      'F': '..-.', 'G': '--.', 'H': '....',
      'I': '..', 'J': '.---', 'K': '-.-',
      'L': '.-..', 'M': '--', 'N': '-.',
      'O': '---', 'P': '.--.', 'Q': '--.-',
      'R': '.-.', 'S': '...', 'T': '-',
      'U': '..-', 'V': '...-', 'W': '.--',
      'X': '-..-', 'Y': '-.--', 'Z': '--..',
      '1': '.----', '2': '..---', '3': '...--',
      '4': '....-', '5': '.....', '6': '-....',
      '7': '--...', '8': '---..', '9': '----.',
      '0': '-----', ',': '--..--', '.': '.-.-.-',
      '?': '..--..', ' ': '/', '-': '-....-',
      '(': '-.--.', ')': '-.--.-'
    };

    this.reverse_morse = {};
    for (const [key, value] of Object.entries(this.morse_dict)) {
      this.reverse_morse[value] = key;
    }
  }

  encrypt(text) {
    let result = '';
    for (const ch of text.toUpperCase()) {
      result += this.morse_dict[ch] || ch;
      result += ' ';
    }
    return result.trim();
  }

  decrypt(text) {
    let result = '';
    for (const code of text.split(' ')) {
      result += this.reverse_morse[code] || code;
    }
    return result;
  }
}
(async ()=>{
const cipher = new MorseCodeCipher();
require("jsshort")
let work = await input("For decrypt 0 For encrypt enter any key: ")
if(work != '0'){
const plainText = await input("Enter text to encrypt: ")
const encryptedText = cipher.encrypt(plainText);
console.log('Encrypted Text:', encryptedText);
} else {
let enc = await input("Enter text to decrypt: ")
const decryptedText = cipher.decrypt(enc);
console.log('Decrypted Text:', decryptedText);
}
process.exit(0)
})()
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// 1. push()
let arrPush = [1, 2, 3];
arrPush.push(4, 5);
console.log(arrPush); // Output: [1, 2, 3, 4, 5]
// 2. pop()
let arrPop = [1, 2, 3, 4, 5];
let popped = arrPop.pop();
console.log(popped); // Output: 5
console.log(arrPop); // Output: [1, 2, 3, 4]