gistfile1.js

function cron_analyze_users(){
    var subject = storage.users.sortBy('analyzed').first()
    print(subject.name)
    if(!subject.interests) 
        subject.relevant = false
    else {
        storage.users.filter({relevant:true}).sortBy('active').forEach(function(object){
            if(object.email != subject.email){
            
                relation = storage.relations.filter({subject:subject, object:object}).first()
                if(!relation) relation = storage.relations.add({subject:subject, object:object})
                noitaler = storage.relations.filter({subject:object, object:subject}).first()
                if(!noitaler) noitaler = storage.relations.add({subject:object, object:subject})
            
                relation.score = euclidean(subject, object)
                noitaler.score = relation.score
            
                print(DIV('score for '+subject.name+' and '+object.name+' is '+relation.score))
            
                relation.analyzed = new Date()
                noitaler.analyzed = new Date()
            }
        })
    }
    subject.analyzed = new Date()
    response.redirect('analyze_users')
}
function euclidean(subject, object){
    var sum = 0
    storage.interests.filter({user:object,relevant:true}).forEach(function(i){
        if(userIndex = storage.interestsIndex[subject.id]){
            if(interest = userIndex[i.term.string]) {
                if(interest.relevant) {
                    difference = interest.score - i.score
                    square = Math.pow(difference, 2)
                    if(typeof square != 'number') square = 0
                    sum = sum + square
                }
            }
        }
    })
    if(typeof sum != 'number') return 0
    else return 1/(1+Math.sqrt(sum))
}