records-access: Function accessors for objects

In elm you can access properties on records as bill.name and by using the accessor as a function by starting with a ., e.g. .name bill. This allows for easier composing, things like point-free style and using in map, filter, reduce, etc.

See how it works in Elm: https://guide.elm-lang.org/core_language.html#records

bill = { name = "Gates", age = 57 }
-- { age = 57, name = "Gates" }

.name bill
-- "Gates"

---

We can't do strictly the same with staring on . in JavaScript due to grammar, but we can do something similar with JavaScript Proxy:

npm install --save record-access

import ra from 'record-access';
const { name } = ra;
// or directly, if using node:
// const { name } = require('record-access');

const bill = { name: "Gates", age: 57 };
name(bill); //=> val 'Gates' : string

// or without destructuring:
ra.name(bill); //=> val 'Gates' : string

We can use it similarly in things like map:

import ra from 'record-access';
const { name } = ra;

const people = [
  { name: 'Jobs' },
  { name: 'Gates' }
];
people.map(name); //=> ['Jobs', 'Gates']

Contribute

Contributions are very welcome, and I'll do my best to help out. Clone the repo by doing

git clone https://github.com/mikaelbr/record-access

Fix bug or develop feature and add tests. Run tests by installing dependencies (npm install) and run:

npm test