A last.fm tag cloud generator build on Vue

score_tags(result){
    for (var tag of result.tags) {
        result.scores[tag] = 0
        /**First, each tagging is weighted by the product of:
         *  - How many times the user has listened to the artist on which the tag was used,
         * and...
         *  - The "count" of that tag on the artist.
         *    I am assuming that this "count" is a confidence % given by last.fm as to the accuracy of the tag on that artist.
         *    I can't find any doccumentation, but this would make sense, as they cap out at 100.
         */
        for (var tagging of result.taggings[tag]) {
            result.scores[tag] += tagging.count/100 * result.listens[tagging.artist]
        }
        /**The sum of all these weighted taggings is then scaled by:
         * 1. How many of the uses of that tag overall fall within the user's library sample (its "uniqueness" to the sample).
         * 
         * 2. How many artists within the sample are tagged with that tag (its "spread" over the sample).
         * 
         * 3. The base 10 logarithm of how many people have used that tag overall (its "reach"; see last.fm API docs).
         *    Base 10 is used so 100 people using the tag makes it twice as significant as 10 people using the tag; a nice balance.
         *    It's also conveniently provided as a function by Math.
         */
        result.scores[tag] = result.scores[tag] 
                                    * (result.tag_meta[tag].library_total / result.tag_meta[tag].total) 
                                    * result.taggings[tag].length * result.taggings[tag].length
                                    * Math.log10(result.tag_meta[tag].reach)
    }
}