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As a team, answer all the questions the team's members submitted on our course forum. Each team member is responsible for one question. But everyone should work together to come up with a good solution. Your answer should consist of Lodash code and a brief writeup. Utilize _.map, _.filter, _.group ...etc. Do not use any for loop.

It is important for everyone to understand all the solutions and make sure you will be able to independently reproduce these solutions when asked to do so. Coming up, we will incorporate variations of these questions into a future hackathon and you are expected to be capable of reproducing and adapting your solutions.

Which instructor's course has the highest enrollment? by Zhili Yang

var list = _.map(data, function(course){
  var instructors=course['Instructors']
  var enroll=course['N']['ENROLL']
  var courseName=course['CourseTitle']
  return _.map(instructors, function(instructor){
    return {"instructor": instructor['name'], "courseTitle": courseName, "enrollment": enroll}
  })
})

var maxGroups=_.max(_.flatten(list), function(course){
	return course['enrollment']
})
return maxGroups

How many courses in IPHY that has 4 credits hours ? by Fadhil Suhendi

var course = _.filter(data,function(n){
 return n['CrsPBADept'] == 'IPHY'
})
var hour = _.filter(course,function(d){
 return d['Hours'] == 4
})

return _.size(hour)

They are 9 courses that have 4 credits hour.

What departments offer the most 4000 level classess? By Brian

var group = _.groupBy(data,function(college){
  return college['Subject']
})

var courseLevels = _.mapValues(group,function(a){
  return _.map(a,function(b){
    return b['Course']
  })  
})
var count = 0
var levelCount = _.mapValues(courseLevels,function(level){
  count = 0
  return _.map(level,function(n){
    if(n >= 4000 && n < 5000){
    count++
  }
  return count
  })
})

var result = _.mapValues(levelCount,function(n){
  return _.max(n)
})
return _.pick(result,function(number){
  return number == _.max(result)
})

Which department has the highest enrollment? By Tristan

var groups = _.groupBy(data,function(n){
    return n['Subject']
})

var courseEnroll = _.mapValues(groups, function(a){
    return _.map(a,function(b){
        return b['N']['ENROLL']
    })
})

var enroll = _.mapValues(courseEnroll, function(n){
    return _.sum(n)
})

return _.pick(enroll,function(number){
    return number == _.max(enroll)
})

What instructors has the highest rating? By Andrew

var list = _.map(data, function(course){
  var instructors=course['Instructors']
  var enroll=course['AvgInstructor']
  return _.map(instructors, function(instructor){
  return {"instructor": instructor['name'], "rating": enroll}
  })
})

var maxGroups= _.max(_.flatten(list), function(course){
 return course['rating']
})
return maxGroups