@diotoborg/rem-eum NPM | npm.io

4.6.102 • Published 10 months ago

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MIT

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10 months ago

@diotoborg/rem-eum

An ESnext spec-compliant Map.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.

Getting started

npm install --save @diotoborg/rem-eum

Usage/Examples

var groupBy = require('@diotoborg/rem-eum');
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, new Map([
    ['even', [0, 2, 4]],
    ['odd', [1, 3, 5]],
]));

var groupBy = require('@diotoborg/rem-eum');
var assert = require('assert');
/* when Map.groupBy is not present */
delete Map.groupBy;
var shimmed = groupBy.shim();

assert.equal(shimmed, groupBy.getPolyfill());
assert.deepEqual(Map.groupBy(arr, parity), groupBy(arr, parity));

var groupBy = require('@diotoborg/rem-eum');
var assert = require('assert');
/* when Array#group is present */
var shimmed = groupBy.shim();

assert.equal(shimmed, Map.groupBy);
assert.deepEqual(Map.groupBy(arr, parity), groupBy(arr, parity));

Tests

Simply clone the repo, npm install, and run npm test

testing resolve glob ec2 transpiler .gitignore lint push every Array.prototype.flatMap client formatting user-streams clone configurable cloudformation json-schema css fps regular expression text lazy exit-code ECMAScript 6 monorepo operating-system polyfill electron mkdirp plugin ignore group global object ast setPrototypeOf ECMAScript 3 which less mixins mock ArrayBuffer#slice yup logging BigInt64Array dependency manager Object.defineProperty sort traverse match fast-deep-clone preprocessor execute eventDispatcher Uint16Array hot css variable chinese spawn fantasy-land rapid pure es5 css less elm packages Array.prototype.includes exec ArrayBuffer invariant eslintplugin typedarrays syntaxerror Object expression toArray package.json reducer RxJS helpers RegExp.prototype.flags is json-schema-validation findLastIndex chrome animation columns env styleguide hookform fullwidth trimRight encryption ECMAScript 2020 in telephone eslint css nesting macos stream make ECMAScript 2016 type Reflect.getPrototypeOf ReactiveExtensions take fast-clone sqs console Int16Array setter compiler ECMAScript 2023 sharedarraybuffer trimStart typeerror hasOwn crypto ECMAScript 2015 package manager compare japanese sigterm manager busy waapi style ecmascript postcss weakmap spinners Object.is regular number live check commander signals channel getintrinsic TypedArray equality getOwnPropertyDescriptor negative es7 importexport async installer deep-copy ECMAScript 2017 ES2020 enumerable -0 shell authentication less typeof Uint8ClampedArray environment setImmediate write define hardlinks kinesis iterate classes @@toStringTag ECMAScript 5 autoscaling i18n stringifier curl require read variables Object.values String.prototype.trim node positive syntax inference prototype graphql waf route styling yaml jsonschema buffer column length ramda ES2016 deepclone streams binary utility readablestream WebSocket CSSStyleDeclaration ES2018 fastclone weakset bundler dataView estree request descriptors typedarray transport Float32Array internal process patch styles typanion es2015 concat handlers file system colour character tester iam typed robust global this value ReactiveX ajax validation keys WebSockets ECMAScript 2021 persistent flatten error eslint-plugin internal slot parser spec accessor descriptor RFC-6455 random codes vars object ascii promise korean byteLength symbol fast-deep-copy prefix serializer ES2021 6to5 deep Object.getPrototypeOf windows ECMAScript 2018 prop toolkit sorted es2018 stable String.prototype.matchAll omit deep-clone property auth loading ES2022 flags Array.prototype.flat flux Int32Array moment ender zx term mkdirs matches bin transpile get fastcopy Uint8Array let hasOwnProperty arktype optimizer es6 lockfile ES8 mru ie back-end hash queue performance values aws width getopt call-bind multi-package call-bound openssl includes hooks ECMAScript 2022 loadbalancing es-abstract findLast create native Map cli react-component flat classname browserslist Iterator 256 express airbnb structuredClone typed array queueMicrotask redirect starter ses variables in css regular-expression window argument offset url cjk private data fnmatch toobject directory format computed-types WeakMap form-validation tc39 contains generics name superagent drop some scheme-validation regex npmignore less compiler spinner es2016 install dom css-in-js pose data superstruct json-schema-validator unicode fastify speed dom-testing-library equal Array.prototype.flatten class-validator environments ansi intrinsic asterisks color Push flatMap from jest move postcss-plugin stringify delete status figlet storagegateway filter utils error-handling Object.keys Function.prototype.name Streams bootstrap css three execfile less.js util.inspect popmotion string colors exit make dir URL gradients css3 side __proto__symlink bcrypt util picomatch tostringtag WeakSet slot key events output progress Object.entries proto path writable proxy fast-copy readable workflow bootstrap less settings curried es-shim API StyleSheet call arraybuffer date json Array.prototype.filter assertion _.extend wait chai js mapreduce diff escape isConcatSpreadable immutable bind qs endpoint cloudtrail fs Symbol.toStringTag query jQuery Rx obj react-testing-library server remove child dependencies visual command-line libphonenumber terminal signal rules signed es copy map elasticache function.length Stream BigUint64Array shrinkwrap serialize awesomesauce [[Prototype]]log dataview fast gradients css parse args slice autoprefixer Object.assign browserlist view handler jsx rds apollo set pipe getter react ES2019 typesafe higher-order core-js core preserve-symlinks Set lru own import RegExp#flags classnames ES2023 defineProperty ES5 URLSearchParams Int8Array harmony https config globals react pose Float64Array vest nope trim ES2015 description tty east-asian-width tslib emit negative zero protocol-buffers deterministic typescript fetch logger safe dotenv CSS acorn properties wget collection efficient iterator valid sameValueZero bound arrays babel-core self ES3 ArrayBuffer.prototype.slice runtime dayjs module performant trimEnd stateless fixed-width byte real-time circular gitignore javascript once cloudwatch redact Array.prototype.findLastIndex TypeScript front-end entries ES2017 option whatwg getPrototypeOf find reuse validate extend walk jsdom io-ts array sham

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