public function compareTo(Uuid $uuid)
    {
        $comparison = null;

        if ($this->getMostSignificantBitsHex() < $uuid->getMostSignificantBitsHex()) {
            $comparison = -1;
        } elseif ($this->getMostSignificantBitsHex() > $uuid->getMostSignificantBitsHex()) {
            $comparison = 1;
        } elseif ($this->getLeastSignificantBitsHex() < $uuid->getLeastSignificantBitsHex()) {
            $comparison = -1;
        } elseif ($this->getLeastSignificantBitsHex() > $uuid->getLeastSignificantBitsHex()) {
            $comparison = 1;
        } else {
            $comparison = 0;
        }

        return $comparison;
    }
public function compareTo(Uuid $uuid)
    {
        $comparison = null;

        if ($this->getMostSignificantBitsHex() < $uuid->getMostSignificantBitsHex()) {
            $comparison = -1;
        } elseif ($this->getMostSignificantBitsHex() > $uuid->getMostSignificantBitsHex()) {
            $comparison = 1;
        } elseif ($this->getLeastSignificantBitsHex() < $uuid->getLeastSignificantBitsHex()) {
            $comparison = -1;
        } elseif ($this->getLeastSignificantBitsHex() > $uuid->getLeastSignificantBitsHex()) {
            $comparison = 1;
        } else {
            $comparison = 0;
        }

        return $comparison;
    }
public function compareTo ( Uuid $ uuid ) { $ comparison = null ; if ( $ this -> getMostSignificantBitsHex ( ) < $ uuid -> getMostSignificantBitsHex ( ) ) { $ comparison = - 1 ; } elseif ( $ this -> getMostSignificantBitsHex ( ) > $ uuid -> getMostSignificantBitsHex ( ) ) { $ comparison = 1 ; } elseif ( $ this -> getLeastSignificantBitsHex ( ) < $ uuid -> getLeastSignificantBitsHex ( ) ) { $ comparison = - 1 ; } elseif ( $ this -> getLeastSignificantBitsHex ( ) > $ uuid -> getLeastSignificantBitsHex ( ) ) { $ comparison = 1 ; } else { $ comparison = 0 ; } return $ comparison ; }
Compares this UUID with the specified UUID.

The first of two UUIDs is greater than the second if the most
significant field in which the UUIDs differ is greater for the first
UUID.

Q. What's the value of being able to sort UUIDs?<br>
A. Use them as keys in a B-Tree or similar mapping.

@param Uuid $uuid UUID to which this UUID is to be compared
@return int -1, 0 or 1 as this UUID is less than, equal to, or greater than $uuid
Compares this UUID with the specified UUID .