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An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.
An ESnext spec-compliant Object.groupBy
shim/polyfill/replacement that works as far down as ES3.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the proposed spec.
npm install --save object.groupby
var groupBy = require('object.groupby');
var assert = require('assert');
var arr = [0, 1, 2, 3, 4, 5];
var parity = function (x) { return x % 2 === 0 ? 'even' : 'odd'; };
var results = groupBy(arr, function (x, i) {
assert.equal(x, arr[i]);
return parity(x);
});
assert.deepEqual(results, {
__proto__: null,
even: [0, 2, 4],
odd: [1, 3, 5],
});
var groupBy = require('object.groupby');
var assert = require('assert');
/* when Object.groupBy is not present */
delete Object.groupBy;
var shimmed = groupBy.shim();
assert.equal(shimmed, groupBy.getPolyfill());
assert.deepEqual(Object.groupBy(arr, parity), groupBy(arr, parity));
var groupBy = require('object.groupby');
var assert = require('assert');
/* when Array#group is present */
var shimmed = groupBy.shim();
assert.equal(shimmed, Object.groupBy);
assert.deepEqual(Object.groupBy(arr, parity), groupBy(arr, parity));
Simply clone the repo, npm install
, and run npm test
FAQs
An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.
The npm package object.groupby receives a total of 16,160,438 weekly downloads. As such, object.groupby popularity was classified as popular.
We found that object.groupby demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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