palutz

// requires
var fs = require ('fs');
var prompt = require('prompt');
var erisC = require('eris-contracts');
var conv = require('binstring');

// NOTE. On Windows/OSX do not use localhost. find the
// url of your chain with:
// docer-machine ls
// and find the docker machine name you are using (usually default or eris).

palutz

val newspaper = List("a1", "a2", "b11", "a2", "aa", "a2", "aa", "a2", "aa")
val note = List("a1", "a2", "b11", "a2", "aa")

val mw = for {   // using for comprehension
  n <- newspaper
  r <- note
  if r == n
} yield r -> 1   // mapped words - getting a List[(String, Int)]

val mw2 = newspaper.flatMap(n =>

palutz

# recursive sum 

### Haskell

  mysum [] = 0
  mysum (x:xs) = x + mysum xs
  Usage: 
  mysum [1..10]   // 55 

### Scala 

palutz

myqs [] = []
myqs (x:xs) = myqs lessthan ++ [x] ++ myqs greaterthan
              where
                lessthan = [a | a <- xs, a <= x ]
                greaterthan = [b | b <- xs, b > x] 

### Scala implementation

def mysq (l : List[Int]) : List[Int] = 
  l match {

palutz

//Greeting.js
import React from 'react';
// use export to let other files access this component
export class Greeting extends React.Component {
  render() {
    return <h1>Hi there, {this.props.name}!</h1>;
  }
}

// App.js

palutz

import React from 'react';
import ReactDOM from 'react-dom';

class Button extends React.Component {
  render() {
    return (
      <button>
        {this.props.text}
      </button>
    );

palutz

import React from 'react';
import ReactDOM from 'react-dom';

const green = '#39D1B4';
const yellow = '#FFD712';

class Toggle extends React.Component {
  constructor(props) {
    super(props);
    this.state = { color: green };

palutz

//
// Child.jsx
//
import React from 'react';

export class Child extends React.Component {
  constructor(props) {
    super(props);
    this.handleChange = this.handleChange.bind(this);
  }

palutz

// AKA React Patterns
// A stateful component class defines a function that calls this.setState. (Parent, lines 15-19)
//The stateful component passes that function down to a stateless component. (Parent, line 24)
// That stateless component class defines a function that calls the passed-down function, and that can take an event object as an argument. (Child, lines 10-13)
// The stateless component class uses this new function as an event handler. (Child, line 20)
// When an event is detected, the parent's state updates. (A user selects a new dropdown menu item)
//The stateful component class passes down its state, distinct from the ability to change its state, to a different stateless component. (Parent, line 25)
//That stateless component class receives the state and displays it. (Sibling, lines 5-10)
//An instance of the stateful component class is rendered. One stateless child component displays the state, and a different stateless child component displays a way to change the (Parent, lines 23-26)

palutz

Verifying that "stefanop.id" is my Blockstack ID. https://onename.com/stefanop