Rails Ruby on Rails

Given that prototype is modeled after Ruby, it seems like the in place '!' versions of these functions are missing. Since Array.prototype.reverse already takes an optional 'inline' parameter, it seems inconsistent that these other functions do not support it.

Let me try to hand type a rough version in this little text box:

  _compact: function() {
    var index = 0, last = this.length - 1;
    while(index <= last) {
      if (this[last] == null) {
        last--;
      } else if (this[index] == null) {
        this[index++] = this[last--];
      } else {
        index++;
      }
    }
    this.length = last + 1;
    return this;
  },

  compact: function(inline) {
    return (inline !== false ? this : this.toArray())._compact();
  }
  ...

(Apologies if I am bringing up an old subject that has already been shot down.)