rauschma

Cheat sheet: JavaScript Array methods

Deriving a new Array from an existing Array:

['■','●','▲'].slice(1, 3)          ⟼ ['●','▲']
['■','●','■'].filter(x => x==='■') ⟼ ['■','■']
    ['▲','●'].map(x => x+x)        ⟼ ['▲▲','●●']
    ['▲','●'].flatMap(x => [x,x])  ⟼ ['▲','▲','●','●']

ThePredators

⭐ Setup Mobile Development Environment

⚠️ The following configuration has been tested on Intel, M1 & M2 Ships ⚠️

Pre-requisit :

If you have any issues with macOS, or need anything related to it check this documentation

Install Xcode Command Line tools :

LeZuse

Node.js on Apple Silicon

Node Version Manager (https://github.com/nvm-sh/nvm) works perfectly across native node installations as well as emulated Rosetta installations. The trick I am using here is to install one LTS version of node under Rosetta and another stable version as native binary.

TODO

• find a way how to run the same node version on both platforms

grenade

# The following packages are needed during `make`
#  - openssl-devel so you don't get:
#      ContentHash.cpp:13:10: fatal error: openssl/sha.h: No such file or directory
#  - redhat-rpm-config so you don't get:
#      gcc: error: /usr/lib/rpm/redhat/redhat-hardened-cc1: No such file or directory
#  - python-devel so you don't get:
#      pywatchman/bser.c:31:10: fatal error: Python.h: No such file or directory
sudo dnf install openssl-devel redhat-rpm-config python-devel libtool

# The rest is just instructions from

gaearon

Note:

When this guide is more complete, the plan is to move it into Prepack documentation.
For now I put it out as a gist to gather initial feedback.

A Gentle Introduction to Prepack (Part 1)

If you're building JavaScript apps, you might already be familiar with some tools that compile JavaScript code to equivalent JavaScript code:

• Babel lets you use newer JavaScript language features, and outputs equivalent code that targets older JavaScript engines.

abelardojarab

Get device numbers

$ nvidia-smi -L
GPU 0: GeForce GTX 1070 (UUID: GPU-2a97b3b6-2318-aa98-f163-d164eb9d54fd)
GPU 1: GeForce GTX 1070 Ti (UUID: GPU-d2085209-9bc9-f2ac-9983-dd7b4a0627dd)
GPU 2: TITAN Xp COLLECTORS EDITION (UUID: GPU-1334cd53-38d9-7e44-4634-6e8290de0795)

Set maximum power limit

krisselden

import * as fs from "fs";
import { createSession } from "chrome-debugging-client";

createSession(async (session) => {
  let browser = await session.spawnBrowser("canary");
  let api = await session.createAPIClient("localhost", browser.remoteDebuggingPort);
  let tabs = await api.listTabs();
  let tab = tabs[0];
  let client = await session.openDebuggingProtocol(tab.webSocketDebuggerUrl);
  await client.send("Profiler.enable");

robdodson

<!--
Copyright 2016 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and

nepsilon

How to generate and apply patches with git?

It sometimes happen you need change code on a machine from which you cannot push to the repo. You’re ready to copy/paste what diff outputs to your local working copy.

You think there must be a better way to proceed and you’re right. It’s a simple 2 steps process:

1. Generate the patch:

git diff > some-changes.patch

gaearon

function mapValues(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    result[key] = fn(obj[key], key);
    return result;
  }, {});
}

function pick(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    if (fn(obj[key])) {