tomi

import { from } from "fromfrom";

var sequence = from([1, 2, 3, 4])
  .map(x => {
    console.log(x);
    return x;
  })
  .map(x => x * 2)
  .take(1)
  .toArray(); // Needed to force the evaluation

tomi

import { from } from "fromfrom";

var sequence = from([1, 2, 3, 4])
  .map(x => {
    console.log(x);
    return x;
  })
  .filter(x => x > 2);

// Nothing is printed the console yet

tomi

var someArray = [1, 2];
var iterator = someArray[Symbol.iterator]();

iterator.next();       // { value: 1, done: false }
iterator.next();       // { value: 2, done: false }
iterator.next();       // { value: undefined, done: true }

tomi

interface Iterable<T> {
  [Symbol.iterator](): Iterator<T>;
}

interface Iterator<T> {
  next(value?: any): IteratorResult<T>;
  return?(value?: any): IteratorResult<T>;
  throw?(e?: any): IteratorResult<T>;
}

tomi

import { from } from "fromfrom";

const users = [
  { id: 1, name: "John", age: 31, score: 2244, active: true },
  { id: 2, name: "Jane", age: 32, score: 2492, active: false },
  { id: 3, name: "Luke", age: 33, score: 2500, active: false },
  …
  { id: 1000, name: "Mary", age: 34, score: 2290, active: true },
];

tomi

Encoding the private key as base64

• Copy the private key to clipboard
• Run command pbpaste | base64 | pbcopy
• The private key is now base64 encoded in the clipboard. Paste it to env variable e.g. to heroku or to .env file

Decoding the private key from base64 in node.js

const private_key = new Buffer(process.env.PRIVATE_KEY, 'base64').toString('ascii');

tomi

1. Launch the node process in the VM with --debug-brk flag. This will break the execution of the node process in the start. node --debug-brk <app.js> <args>. Node.js versions >= 6.3 support new inspector protocol: node --inspect <app.js> <args>

2. Create a launch config in VS Code with a mapping from the VM file system to the local file system

{
  "name": "Attach node",
  "type": "node",
  "request": "attach",
 "address": "localhost",

tomi

on *:KICK:#:{
  if (($knick == $me) && ($nick != $me)) {
    /write revenge.txt $chan � $nick � $asctime(HH:nn dd/mm/yyyy)
  }
}

on *:OP:#:{
  if ($opnick == $me) /tarkistappa
}