learner-long-life

How to get on Rinkeby Testnet in less than 10 minutes

Following instructions from the excellent https://www.rinkeby.io/

Synchronizing a Full Node

A full node lets you access all state. There is a light node (state-on-demand) and wallet-only (no state) instructions as well,

rain-1

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

• Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
• Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
• Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
• Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
• Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

rizo

type void

(* Core pipe type *)

type ('a, 'b, 'r) pipe =
  | Yield of ('b  * (unit -> ('a, 'b, 'r) pipe))
  | Await of ('a -> ('a, 'b, 'r) pipe)
  | Ready of 'r

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

vietlq

import turtle, math

def p_line(t, n, length, angle):
    """Draws n line segments."""
    for i in range(n):
        t.fd(length)
        t.lt(angle)

def polygon(t, n, length):
    """Draws a polygon with n sides."""

florentbr

from selenium import webdriver
from selenium.webdriver.remote.webelement import WebElement
import os.path

# JavaScript: HTML5 File drop
# source            : https://gist.github.com/florentbr/0eff8b785e85e93ecc3ce500169bd676
# param1 WebElement : Drop area element
# param2 Double     : Optional - Drop offset x relative to the top/left corner of the drop area. Center if 0.
# param3 Double     : Optional - Drop offset y relative to the top/left corner of the drop area. Center if 0.
# return WebElement : File input

freakingawesome

import Html exposing (..)
import Html.Events exposing (..)

main : Program Never Model Msg
main =
  Html.program
    { init = init
    , view = view
    , update = update
    , subscriptions = \_ -> Sub.none

chrise86

import React, {PropTypes} from 'react';
import classNames from 'classnames';

class BatchDropZone extends React.Component {

    static propTypes = {

        // function that recieves an array of files
        receiveFiles: PropTypes.func.isRequired,

karlhorky

NOTE

You may not need local branches for all pull requests in a repo.

To fetch only the ref of a single pull request that you need, use this:

git fetch origin pull/7324/head:pr-7324
git checkout pr-7324
# ...

eatonphil

module MaybeMonad = struct
	type 'a t = None | Maybe of 'a

	let return (a: 'a) : 'a t = Maybe a

	let (>>=) (m: 'a t) (f: 'a -> 'b t) : 'b t = match m with
		| None -> None
		| Maybe a -> f a

	let get (m: 'a t) (a: 'a) = match m with