Todos los lenguajes de programación admiten una cosa que se llama comentarios
Cualquier linea que escribes en un archivo de ruby (por ejemplo) se ejecutará antes o después salvo si se trata de un comentario
En ruby los comentarios empieza con el caracter especial #, un ejemplo:
#esto es un comentario
puts "hola santi"
| Latency Comparison Numbers | |
| -------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns | |
| Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms | |
| Read 4K randomly from SSD* 150,000 ns 0.15 ms |
| Latency Comparison Numbers Time Light Distance Approximate Light Distance | |
| -------------------------- ---- -------------- -------------------------- | |
| L1 cache reference 0.5 ns 0.15 m Diagonal across your smartphone | |
| Branch mispredict 5 ns 1.5 m Height of Natalie Portman | |
| L2 cache reference 7 ns 2.1 m Height of Shaq | |
| Mutex lock/unlock 25 ns 7.5 m Height of a school flag pole | |
| Main memory reference 100 ns 30 m Half a Manhattan city block (North/South) | |
| Compress 1K bytes with Zippy 3,000 ns 900 m Width of Central Park | |
| Send 1K bytes over 1 Gbps network 10,000 ns 3,000 m Width of Manhattan | |
| Read 4K randomly from SSD* 150,000 ns 45,000 m NYC to Hempstead on Long Island |
With this you can do
Restaurant.all_with_photo #=> will return all the restaurants with a photo
User.first.photo_width #=> 65px
Restaurant.first.photo_url #=> "http://......"
| <a href="javascript:(function(){_my_script=document.createElement('SCRIPT');_my_script.type='text/javascript';_my_script.src='https://raw.github.com/gist/1498854/62cca0c124580741a3572a751d2f2569413ee37f/full_cke.js';document.getElementsByTagName('head')[0].appendChild(_my_script);})();">Full_CKE</a> |
| ### | |
| ------> HTTPClientWithCache <------ | |
| This class is a wrapper around the standard Titanium.Network.HTTPClient(), but it adds a | |
| few nice features: | |
| * A cache backed by a SQLite database. All HTTPClientWithCache instances use the same database table, with | |
| the primary cache key being a hash of the full URL (and any data parameters in a POST) | |
| * The cache is automatically pruned before each query | |
| * A retry mechanism, so that you can retry a particular query a number of times before failing. |
When developing in rails I use watchr to run the tests each time a file is saved, but lots of times I find my self adding a whitespace or a newline and saving just to trigger watchr and run the tests.
I wanted to have is a simple keyboard shortcut (like F15) to tell watchr to run the last spec, and mpartel (thx! : ) gave me an idea on how to do it, so here it is:
Obviously you need watchr, but we're also going to need pgrep that will help us find out the pid of the watchr process. So go ahead and do
sudo port install proctools
In the project I'm working on we wanted to have a Category model which we wanted to be nestable. But we also liked the user to have a draggable interface to manage and rearrange the order of his categories. So we chose awesome_nested_set for the model and jQuery.nestedSortable for the UI.
It took me some time to arrange things to work properly so I wanted to share my work in case it helps anybody.
you might want to take a look at a demo app
Do you use ActiveRecord? Tired of writing in console all those verbose Arel methods? Well short_arel is for you!
The idea is to reduce to the minimum the numbers of characters you have to type to perform ActiveRecord queries. short arel just aliases long-named methods with its short version, so instead of having to write:
Post.where(:public => true).includes(:comments).order('edited_at ASC')
you could write
This James script asks the user for the origin and destination stations of the MLO network and reports to him how much time he has before his train passes by.
MLO stands for the Metro Ligero Oeste, the tramway network of the west Madrid area
I have to admit it is not specially useful since recognition of spanish names is not the strongest points of the Mac speech recognition (my metro stop is called Somosaguas Sur and it is barely impossible for James to recognize it). Maybe I could translate the names into english (actually that could be fun! somosaguas becomes wearewaters XDDD)