exampleLens.js

import * as L from 'partial.lenses';
import * as R from 'ramda';
const classA = {
  p: 2,
  d: 2,
  c: true,
  classB: null,
};

const classAOptic = ['classB'];

const classB = {
  r: 4,
  f: 'f',
  k: '',
}

const classBOptic = ['r'];

const data1 = {
  p: 2,
  d: 2,
  c: true,
  classB: {
    r: 4,
    f: 'f',
    k: '',
  },
};



const composedOptic = [classAOptic, classBOptic];
console.log(L.get(composedOptic, data1));

const data = {
  d: {
    1: {
      a: {
        a: 2,
      },
     b: 2,
    },
    2: {
      a: {
        a: 3,
      },
      c: 3,
    },
    3: {
      a: {
        a: 100,
      },
    },
  }
};

const myATraversal = ['d', L.values, 'a'];
console.log(L.collect(myATraversal, data));
console.log(L.disperse(
  [myATraversal, 'a'], 
  [1,2], 
  data
  )
  );