phrase_posibility.js

/**
 * This will only calculate how many random
 * attemps it will take to form a full phrase.
 * 
 * It takes around 5000 attemps for a 2 characters phrase. 
 * Cannot imagine how much will it take for a full book with meaning.
 * 
 * Tests:
 * - "h" = min: 16 | max. 40
 * - "ha" = min: 1189 | max: 7500
 * - "hel" = one single test: 166797
 * 
 */

// What we are looking for
const phraseToSearch = 'hello';

const waitMilliseconds = 2000; // milliseconds to start the application

/**
 * function that generates a random password
 */
generateRandomPassword = (length) => {
    
    /**
     * Available characters. 
     * If we include special characters, it may take forever to get
     */
    const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 ";
    let retVal = "";
    for (var i = 0, n = charset.length; i < length; ++i) {
        retVal += charset.charAt(Math.floor(Math.random() * n));
    }
    return retVal;
}



/**
 * This will make the whole calculation
 */
calculateAttemps = ()=>{
    let attemps = 0;
    let got_phrase = '';
    while( got_phrase !== phraseToSearch ){
        got_phrase = generateRandomPassword(phraseToSearch.length);
        console.log(got_phrase);
        attemps++;
    }
    return attemps;
}

console.log('We are going to try to get the following phrase: ' + phraseToSearch.toString());

setTimeout( ()=>{
    console.log(' ');
const totalAttemps = calculateAttemps();
console.log(' ');
console.log(`It took [${totalAttemps}] attemps to get to the phrase ${phraseToSearch}`);
}, waitMilliseconds ); // seconds before starting the application



/*const test = generateRandomPassword(8);
console.log('Test: ' + test);*/