public/subjects/curry-entries

Curry Entries

Instructions

This exercise consists in creating curry functions to apply in the object's entries. You will have to create the following curry functions:

• defaultCurry curries two objects in which the second object overrides the values of the first. If the key is not present then add it with the corresponding value.

defaultCurry({
  http: 403,
  connection: 'close',
  contentType: 'multipart/form-data',
})({ http: 200, connection: 'open', requestMethod: 'GET' })
// output
{
    http: 200,
    connection: 'open',
    contentType: 'multipart/form-data',
    requestMethod: 'GET'
}

• mapCurry replicates function .map, where first entry is a function, second is an object.

mapCurry(([k, v]) => [`${k}_force`, v])(personnel)
// output
{
  lukeSkywalker_force: { id: 5,  pilotingScore: 98, shootingScore: 56, isForceUser: true  },
  sabineWren_force:    { id: 82, pilotingScore: 73, shootingScore: 99, isForceUser: false },
  zebOrellios_force:   { id: 22, pilotingScore: 20, shootingScore: 59, isForceUser: false },
  ezraBridger_force:   { id: 15, pilotingScore: 43, shootingScore: 67, isForceUser: true  },
  calebDume_force:     { id: 11, pilotingScore: 71, shootingScore: 85, isForceUser: true  },
}

• reduceCurry replicates function .reduce, where first entry is function, second is (object, initial value).

reduceCurry((acc, [k, v]) => (acc += v))({ a: 1, b: 2, c: 3 }, 0)
// output
6

• filterCurry replicates function .filter, where first entry is function, second is object.

filterCurry(([k, v]) => typeof v === 'string' || k === 'arr')({
  str: 'string',
  nbr: 1,
  arr: [1, 2],
})
// output
{ str: 'string', arr: [1, 2] }

Using each curry function create the following functions with a parameter personnel:

• reduceScore that will return the total value of the scores of the persons who use the force (this function can have one additional parameter)
• filterForce that will return the force users with shootingScores equal or higher than 80
• mapAverage that will return a new object with the propriety averageScore that is the average of the scores for each person

Notions

• devdocs.io/javascript/global_objects/array/filter
• devdocs.io/javascript/global_objects/array/map
• devdocs.io/javascript/global_objects/array/reduce
• devdocs.io/javascript/global_objects/object/entries
• devdocs.io/javascript/global_objects/object/fromentries
• stackoverflow.com/questions/36314/what-is-currying

Code provided

all code provided will be added to your solution and doesn't need to be submited.

// prettier-ignore
const personnel = {
  lukeSkywalker: { id: 5,  pilotingScore: 98, shootingScore: 56, isForceUser: true  },
  sabineWren:    { id: 82, pilotingScore: 73, shootingScore: 99, isForceUser: false },
  zebOrellios:   { id: 22, pilotingScore: 20, shootingScore: 59, isForceUser: false },
  ezraBridger:   { id: 15, pilotingScore: 43, shootingScore: 67, isForceUser: true  },
  calebDume:     { id: 11, pilotingScore: 71, shootingScore: 85, isForceUser: true  },
}