javascript - Using Ramda map helper in pointfree way -


how can change code:

 map(user => assoc('isadult', isadult(user), user)

to function pointfree (using ramda). thinking how usewith, can't find working implementation.

any ideas?

import { pipe, prop, gte, __, map, assoc, sortwith, descend } 'ramda'  const isadult = pipe(   prop('age'),   gte(__, 18) )  const func = pipe(   map(user => assoc('isadult', isadult(user), user)),   sortwith([     descend(prop('isadult')),     descend(prop('age')),   ]) )  export default func

edit (more info):

i want create function returns array of objects extended isadult key. if user more 18 years old, set flag true.

in addition, function should return users sorted flag isadult , sorted key age.

sample data:

const data1 = [   {     name: 'cassidy david',     email: 'sit@nullaeuneque.co.uk',     id: 'fc92bf1e-a6fd-e5c1-88ab-183bd1bc59c5',     position: 1,     age: 53,     created_at: '2017-04-07'   },   {     name: 'gwendolyn edwards',     email: 'ut.mi.duis@elementumsemvitae.net',     id: '00000001-ed9d-3a88-0d3c-07a148fd43ed',     position: 2,     age: 10,     created_at: '2016-05-21'   },

i think it's debatable whether trying make point-free useful.

this quite readable is:

map(user => assoc('isadult', isadult(user), user)),

point-free great technique can enhance readability. if doesn't, wouldn't bother it.

that said, if want try point-free, chain helpful. note how chain works functions: chain(f, g)(x) //=> f(g(x), x).

so can write relevant part 

map(chain(assoc('isadult'), isadult))

you can see in action on ramda repl.


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