Random letter sequencing with a pattern

Question

I'd like get random letters together to generate weird words with a specified pattern like cvvcv (consonants and vowels). No consonant variations like th- sh- ch- etc needed.

The problem is, when I attempt to do one, I have to specify the length of the word. However, I want the number of characters in the output to be the same in the pattern. I mean the length would be pre-defined by the character number of the pattern.

An example with a fiddle would be great and much appreciated.

Answer 1

You can try this, too:

function replacePattern(pattern) {
    var possibleC = "BCDFGHJKLMNPQRSTVWXZ";
    var possibleV = "AEIOUY";

    var pIndex = pattern.length;
    var res = new Array(pIndex);

    while (pIndex--) {
       res[pIndex] = pattern[pIndex]
         .replace(/v/,randomCharacter(possibleV))
         .replace(/c/,randomCharacter(possibleC));
    }

    function randomCharacter(bucket) {
        return bucket.charAt(Math.floor(Math.random() * bucket.length));
    }   
    return res.join("").toLowerCase();
};

https://jsfiddle.net/u2aooqf7/