ahirschberg

$(xml).find("enclosure").each(function(i) {
  console.log( $(this).attr('url') ); // note that I'm using $(this) and not i
}); 

ahirschberg

$(xml).find("enclosure").each(function(i) {
  console.log( i.attr('url') ); // -> TypeError: i.attr is not a function
}); 

ahirschberg

<section>
  <enclosure url="a" />
  <other_tag>
    <enclosure url="b" />
  </other_tag>
</section>

ahirschberg

// xml document
var xml = ('<section>               ' +
           '  <enclosure url="a"/>  ' +
           '  <other_tag>           ' + 
           '    <enclosure url="b"/>' + 
           '  </other_tag>          ' + 
           '</section>              ' )

$(xml).find("enclosure").each(function(i) {
  console.log( i.attr('url') );

ahirschberg

bookListItem = $('<li book-id=' + id + '><a href="book.html"><h2>' + title + '</h2><p>' + realText + '</p></a></li>');
bookListItem.click(function(){
  book_id = $(this).attr("book-id");
  localStorage.setItem("id", book_id);
});

ahirschberg

// good code
getJSON("https://librivox.org/api/feed/audiobooks/title/^" + input + "?&format=json", 
function(url_request) {
  url_request.response // -> Object { books: Array[50] }
});

ahirschberg

// bad code
var url_request = getJSON("https://librivox.org/api/feed/audiobooks/title/^" + input + "?&format=json");
url_request.response // -> null

ahirschberg

#include <stdlib.h>
#include <stdio.h>

struct listnode {
    int head;
    struct listnode *tail;
};

struct listnode *cons(int data, struct listnode *list) {
    struct listnode *newlist = malloc(sizeof (struct listnode));

ahirschberg

def get_random_number
  8 ## <-- number was chosen at random
end

ahirschberg

# Implementation 3
class Base
  def get_number
    raise NotImplementedError
  end
end