ggauravr

from matplotlib import pyplot as plt
from sklearn.datasets import load_iris
import numpy as np

# load the dataset to be used
iris = load_iris()

# get the 150*4 features into varibale features
features = iris.data

ggauravr

(function() {
  'use strict';
  
  console.log(typeof someVariable); // prints "undefined"
})();

ggauravr

(function() {
  'use strict';
  
  console.log(typeof someVariable); // prints "undefined"
  console.log(typeof anotherVariable); // also prints "undefined"

  var someVariable;
  var anotherVariable = "Defined";

})();

ggauravr

(function() {
  'use strict';

  var someVariable = undefined;
  var anotherVariable = undefined;

  console.log(typeof someVariable); // prints "undefined"
  console.log(typeof anotherVariable); // also prints "undefined"

  anotherVariable = "Defined";

ggauravr

(function() {
  'use strict';

  console.log(typeof someVariable); // ReferenceError!

  let someVariable = "Defined";

})();

ggauravr

(function() {
  'use strict';

  let someVariable; // not even initialized to undefined, FTW !!

  console.log(typeof someVariable); // ReferenceError

  someVariable = "Defined";

})();

ggauravr

// from URL: http://www.imdb.com/search/title?year=2015,2015&title_type=feature&sort=moviemeter,asc
var titleLinks = document.querySelectorAll('td.title a[href^="/title/"]'),
    titleArray = Array.prototype.slice.call(titleLinks),
    titles     = titleArray.map(function(link) {
      return link.innerText;
    });

// titles is an array like this:
// ["The Revenant", "Star Wars: Episode VII - The Force Awakens", "The Hateful Eight", "Spotlight", 
// "The Martian", "The Big Short", "Room", "Hardcore Henry", "Bridge of Spies", "Spectre", "Sicario", 

ggauravr

var titleLinks  = document.querySelectorAll('table a[href^="/movies/?id"]'),
    titleArray 	= Array.prototype.slice.call(titleLinks),
    titles      = titleArray.map(function(link) { 
      return link.innerText + '@' + link.href; 
    });

// titles is an array like this:
// ["Star Wars: The Force Awakens@http://www.boxofficemojo.com/movies/?id=starwars7.htm", 
// "Jurassic World@http://www.boxofficemojo.com/movies/?id=jurassicpark4.htm", 
// "Avengers: Age of Ultron@http://www.boxofficemojo.com/movies/?id=avengers2.htm", 

ggauravr

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it much simpler to think about both the old list and the new one, what they contain, and

ggauravr

ModuleParseError: Module parse failed: /Users/gramesh/Documents/projects/start-page-nodejs/restaurant-profile/src/components/button/index.js Unexpected token (6:4)
You may need an appropriate loader to handle this file type.
| export default function Button(props) {
|   return (
|     <button type='button' className={styles.button}>{props.children}</button>
|   );
| }

babelrc
{