catalinmiron

import { Entypo, Feather } from '@expo/vector-icons';
import faker from 'faker';
import * as React from 'react';
import { Dimensions, FlatList, Text, TouchableOpacity, View } from 'react-native';

const { width, height } = Dimensions.get('screen');

faker.seed(10);

const data = [...Array(20).keys()].map(() => ({

VassilisPallas

function sleep(delay) {
    var start = new Date().getTime();
    while (new Date().getTime() < start + delay) ;
}

function convertTime(hours) {
    var realHours = Math.floor(hours);
    var minutes = (hours - realHours) * 60;
    var realMinutes = Math.round(minutes);
    var realSeconds = ((hours - realHours) + (minutes - realMinutes)) * 60;

bmaupin

See also:

• Free backend hosting
• https://free-for.dev/#/?id=dbaas

Service	Type	Storage	Limitations
Amazon DynamoDB	⚠️ Proprietary NoSQL	25 GB	⚠️ Payment method required
Amazon RDS	⚠️ Proprietary RDBMS		⚠️ Only free for 1 year
Azure SQL Database	MS SQL Server		⚠️ Only free for 1 year
👉 Clever Cloud	PostgreSQL, MySQL, MongoDB, Redis	256 MB (PostgreSQL)	Max 5 connections (PostgreSQL)

dan1wang

If you are using Firebase on a Spark (free) plan, you can only make outbound networking requests to Google services. Unfortunately, that does not include Web app deployed from App Script (script.google.com/macros/s/.../exec). (Stackoverflow #43330192)

This is a crude example showing how to execute Apps Script using the scripts.run method of Apps Script API.

In this example, the Firebase app does not store the user's OAuth id token, does not validate the access token (e.g. the access token is issued for your project, not someone else's), and does not store the refresh token (access token will expire 60min after issue if not refreshed). For production, these issues must be resolved.

jigewxy

var count =Math.floor(Math.random()*100);

process.on('message', (msg)=>{

  console.log("CHILD: message received from parent process", msg);

  count = parseInt(msg) +1;
  console.log("CHILD: +1 from child");

DavidWells

service: service-name

provider:
  name: aws
  runtime: nodejs6.10

functions:
  myfunc:
    handler: handler.myfunc

barbietunnie

How to download your Udemy course videos using youtube-dl

$ youtube-dl --list-extractors | grep udemy

Steps

1. Get link to the course to download. e.g. https://www.udemy.com/course-name/
2. Login into udemy website, save the cookie from chrome using Chrome (Cookie.txt)[1] export extension. Save it to file udemy-cookies.txt
3. Get the link of the video that you want to download. usually in format. Use the command provided below where you have to replace the {course_link} and {path_to_cookies_file} with respective paths.

$ youtube-dl {course_link} --cookies {path_to_cookies_file}

simenbrekken

import firebase from 'firebase'
import { filter, map } from 'lodash'
import { makeExecutableSchema } from 'graphql-tools'

firebase.initializeApp({
  databaseURL: 'https://grafire-b1b6e.firebaseio.com',
})

const mapSnapshotToEntity = snapshot => ({ id: snapshot.key, ...snapshot.val() })
const mapSnapshotToEntities = snapshot => map(snapshot.val(), (value, id) => ({ id, ...value }))

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

joepie91

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

• Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
• Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
• If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
• If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's