ChuntaoLu

Frontend Development

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ChuntaoLu

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

ChuntaoLu

require 'csv'

def memstats
  size = `ps -o size= #{$$}`.strip.to_i
end

memstats #4900
CSV.open('visitors.csv', headers: true) do |csv|
	visitors = csv.each # Enumerator
	memstats # 5164

ChuntaoLu

#! /bin/sh
alias gs="git status"
alias gc="git commit"
alias gr="git checkout"
alias ga="git add"
alias gl="git lola"

ChuntaoLu

<% flash.each do |type, message| %>
  <div class="alert <%= bootstrap_class_for(type) %> fade in">
    <button class="close" data-dismiss="alert">×</button>
    <%= message %>
  </div>
<% end %>

ChuntaoLu

inputs = %w[
  CollectionSelectInput
  DateTimeInput
  FileInput
  GroupedCollectionSelectInput
  NumericInput
  PasswordInput
  RangeInput
  StringInput
  TextInput

ChuntaoLu

describe "Shopping Cart Requests" do
  let!(:user) { Fabricate(:user) }

  before(:each) do
    login_user_post("admin", "admin")
  end

  context "when I visit the shopping cart" do
    it " show the logged in users' cart items " do
      #Test stuff

ChuntaoLu

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

ChuntaoLu

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

ChuntaoLu

var serial_maker = function(){
  
  // produce an object that produces unique strings.
  
    var prefix = '';
    var seq = 0;
    return {
        set_prefix: function (p) {
            prefix = String(p);
        },