class Pair < Struct.new(:first, :second)
  def same?     inject(:==);  end
  def add       reduce(:+);   end
end
 
a = Pair.new(4,4)   # => #<struct Pair first=4, second=4>
a.same?             # => true
a.add               # => 8
 
b = Pair.new(5,6)   # => #<struct Pair first=5, second=6>
b.same?             # => false
b.add               # => 11

---

$$: current shell id
$!: background command id
$?: last command exit status
!!: execute the last command
!n: execute the nth command
%n: manipulates the nth job (command in the background)

---

siare  / usuarioSIARE

---
CSS design pitfalls

#1: Use one font per project
#2: Have a small number of "go-to" fonts (all of the fonts you'll ever need)
Georgia     sophisticated serif
Helvetica   clean and neutral design
Lato        friendly and "natural" look
Raleway     more modern geometric look
#3: Use a set of font size
5, 7, 9, 12, 16, 21, 28, 37, 50, 67, 89, 119, 159
#4: One Color, and shades of Gray
#5: Avoid Column Soup, & Make The Grid Your Friend
When you use a framework such as Bootstrap, just forget that you have 12 columns. Pretend you have a grid with 3, 4, or 6 columns.
#6: Don't divide my attention. Focus it.

---

Just hit Ctrl+Shift+' to select both tags for editing.

---

# Prompt da direita mostrando versão do ruby + parte final do ip
RPROMPT='%F{blue}${ruby_info[version]}%F{white}|%F{blue}`hostname -I | cut -d" " -f1 | cut -d"." -f3,4`'

---

** Criando layouts em css: http://learnlayout.com/

By Daniel Larusso Barros on Wednesday, February 20, 2013 at 4:16pm

Vetores prontos
http://www.freevectorarchive.com/
http://www.vecteezy.com/
http://all-silhouettes.com/
http://thenounproject.com/
http://www.brandsoftheworld.com/

Cores
http://colourlovers.com
https://kuler.adobe.com

Fontes
http://www.dafont.com/
http://www.fontsquirrel.com
http://copypastecharacter.com/

Imagens
http://flickr.com/
http://www.sxc.hu/
http://www.iconfinder.com/
http://cgtextures.com/

Converter Corel pra EPS
http://www.filespazz.com/


* { background-color: rgba(255,0,0,.2); }
* * { background-color: rgba(0,255,0,.2); }
* * * { background-color: rgba(0,0,255,.2); }
* * * * { background-color: rgba(255,0,255,.2); }
* * * * * { background-color: rgba(0,255,255,.2); }
* * * * * * { background-color: rgba(255,255,0,.2); }


You can create containers that maintain a constant aspect ratio by using padding-bottom as a percentage.
<div style="width: 100%; position: relative; padding-bottom: 20%;">
<div style="position: absolute; left: 0; top: 0; right: 0; bottom: 0;">
this content will have a constant aspect ratio that varies based on the width.
</div>
</div>

background-position: calc(100% - 50px) calc(100% - 20px);