Carmel-backed word shortner (extracted from here https://gist.github.com/softblow/77644b5e20b2759f80d8 )

camelShortener.js

var camelShortener = {
  origShort : new Map(),
  shortOrig : new Map(),
  shorten : function (str, len) {
    if (this.origShort.get(str) !== undefined)
      return this.origShort.get(str);

    //console.log("before : " + str);

    var camels = str.replace(/([a-z])([A-Z])/,'$1,$2' ).split(",");

    // for condition purpose
    camels.getStrLenSum = function () {
      var sum = 0;
      this.forEach(function (elem) {
        sum += elem.length;
      });
      return sum;
    }

    // phase 1 : remove vowel
    var index = camels.length-1;
    while((camels.getStrLenSum() > len ) && (index >= 0) ) {
      camels[index] = camels[index].replace(/[aeiou]/g,'');
      index--;
    }

    //phase 2 : remove letters
    index = camels.length-1;
    while((camels.getStrLenSum() > len ) || (this.shortOrig.get(camels.join('')) !== undefined) ) {
      if (camels[index].length > 1)
        camels[index] = camels[index].slice(0,-1);
      index--;
      if (index < 0) {
        index = camels.length-1;
      }
    }

    var ret = camels.join('');

    this.shortOrig.set(ret, str);
    this.origShort.set(str, ret);

    //console.log("after : " + ret + " : " + ret.length);
    return ret;
  }

}