wasmuth/test/groupPropBy.js

Practical, functional utilities that fallback on native implementations as much as possible

const test = require("tape");

const {groupPropBy} = require("../");

test("groupPropBy", (t) => {
  const src = [
    {a: 1, b: 1},
    {a: 1, b: 2},
    {a: 2, b: 3},
  ];
  const grouped = groupPropBy("b", "a", src);
  t.deepEqual(grouped[1], [1, 2]);
  t.deepEqual(grouped[2], [3]);
  t.end();
});