const R = require('ramda')
const L = require('ramda-lens')
console.log( L.view(R.lensProp('value'), { value: 11 }) )
const value = R.lensProp('value')
const d1 = { name: 'data1', value: 1 }
const r1 = L.view(value, d1)
console.log(r1)
const d2 = L.set(value, 22, d1)
console.log(d2)
const d3 = L.over(value, x => x * 10, d1)
console.log(d3)
return L.lens((x) => { return x.get(key); },
(val, x) => { return x.set(key, val); });
};
// immutable data
const addrs = I.List.of(I.Map({street: '99 Walnut Dr.', zip: '04821'}), I.Map({street: '2321 Crane Way', zip: '08082'}));
const user = I.Map({id: 3, name: 'bob', addresses: addrs});
const addresses = immLens('addresses');
const street = immLens('street');
const allStreets = _.compose(addresses, L.mapped, street);
const getUser = (id) => {
return new Task((reject, resolve) => {
setTimeout(() => {
resolve(user);
}, 400);
});
};
const profilePage = _.compose(_.map((x) => {
return `<span>${x.get('street')}</span>`;
}), L.view(addresses));
const updateUser = L.over(allStreets, _.replace(/\d+/, '****'));
const renderProfile = _.compose(_.map(_.compose(profilePage, updateUser)), getUser);
renderProfile(1).fork(console.log, console.log);
const _ = require('ramda');
// import {mapped, over, view, set, lens, iso, from} from 'ramda-lens';
const L = require('ramda-lens');
// import {Map, List} from 'immutable';
const I = require('immutable');
const addrs = [{street: '99 Walnut Dr.', zip: '04821'}, {street: '2321 Crane Way', zip: '08082'}];
const user = {id: 3, name: 'Charles Bronson', addresses: addrs};
// Make a lens for the name property.
const name = _.lensProp('name');
console.log(L.view(name, user));
// Charles Bronson
console.log(L.set(name, 'Richard Branson', user));
// {id: 3, name: 'Richard Branson', addresses: [{street: '99 Walnut Dr.', zip: '04821'}, {street: '2321 Crane Way', zip: '08082'}]}
console.log(L.over(name, _.toUpper, user));
// {id: 3, name: 'CHARLES BRONSON', addresses: [{street: '99 Walnut Dr.', zip: '04821'}, {street: '2321 Crane Way', zip: '08082'}]}
const addresses = _.lensProp('addresses');
const street = _.lensProp('street');
const first = _.lensIndex(0);
const firstStreet = _.compose(addresses, first, street);
console.log(L.view(firstStreet, user));