roberto

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

roberto

class ArticlesController < ApplicationController
  before_filter :load_temp_upload, :only => ["create", "update"]

  def update
    if params[:ajaxupload]
      if @article.update_attributes(:picture => params[:article][:picture])
          render(:text => {:response => 'success', :url => @article.picture.url(:thumb)}.to_json)
        else
          render(:text => {:response => 'failure', :message => @article.errors.full_messages.join('\n')}.to_json)
        end

roberto

const setJackson = R.pipe(
  R.prop("users"),
  R.map(
    (user) =>
      R.startsWith('J', user.name)
        ? {...user, name: R.concat(user.name, ' Jackson')}
        : user
  )
)

roberto

const isOld = R.gt(R.__, 33)

const getOldPeople = R.pipe(
  R.prop("users"),
  R.filter(R.where({age: isOld}))
)

const getOldPeople = R.pipe(
  R.prop("users"),
  R.filter(R.propSatisfies(isOld, 'age'))

roberto

R.pipe(
  R.prop("users"),
  R.sortBy(R.prop("age")),
  R.take(3),
  R.pluck("name")
)

roberto

const myProp = (key, maybeObject) => {
  if (maybeObject === undefined) {
    return (object) => {
      return myProp(key, object)
    }
  }

  return maybeObject[key]
}

roberto

const increment = (key, obj) => {
  return {
    ...obj,
    [key]: obj[key] + 1
  }
}

roberto

10 weird tricks that React developers near you are using to create reusable components

https://www.youtube.com/watch?v=nQo0EdHNjto

• reusable components
  • props over state
    • prop === state => problem!
  • stateless components
  • easy to unit test
• PropTypes are serious

roberto

import Html exposing (text)

partition n =
  break (n - 1, 0)
  
break (n, total) =
  case n of
    1 -> total + 1
    n -> 1 + break(n - 1, total + 1)

roberto

Blazing fast:

emacs --daemon
emacsclient .

inside terminal:

emacsclient -nw .