Composing_ramda_lenses.js

const { lensPath, view, compose, pipe, defaultTo, curry } = require('ramda');

const reflectObject = {
  data: {
    GET: {
      system: {
        ntp: 3,
      },
    },
  },
};

const dataLens = lensPath(['data']);
const GETLens = lensPath(['GET1']);
const systemLens = lensPath(['system']);
const ntpLens = lensPath(['ntp']);
const dataGetSystemNtpLens = compose(dataLens, GETLens, systemLens, ntpLens);
const viewOr = curry((defaultValue, lens, obj) => pipe(view(lens), defaultTo(defaultValue))(obj));

console.dir(viewOr(null, dataGetSystemNtpLens, reflectObject));