JavaScript_Prototype_Random_String.js

class RandomStringGenerator {
  constructor(seed = Date.now()) {
    this.seed = seed;
  }

  // Linear Congruential Generator (LCG) for pseudo-random values
  _random() {
    // Parameters from Numerical Recipes
    this.seed = (1664525 * this.seed + 1013904223) % 4294967296;
    return this.seed / 4294967296;
  }
}

// Add prototype function
RandomStringGenerator.prototype.generate = function(length = 16) {
  const charset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-_=+[]{}|;:,.<>?/~`';
  let result = '';

  for (let i = 0; i < length; i++) {
    const index = Math.floor(this._random() * charset.length);
    result += charset.charAt(index);
  }

  this.generatedString = result; // Store in class instance
  return result;
};


// Example usage

const generator = new RandomStringGenerator(12345); // Optional: input your random seed
const randomStr = generator.generate(20); // Generate a 20-char string
console.log("Generated:", randomStr);
console.log("Stored:", generator.generatedString);