Get disk usage information about the Desktop $ du -h -d 0 Desktop 14G Desktop Information about how much free space is available on computer $ df -lh Filesystem Size Used Avail Capacity Mounted on /dev/disk0s2 111Gi 109Gi 2.3Gi 98% / ...

Show all the branches git branch Create a new branch git branch my_experimental_feature Use that branch git checkout my_experimental_feature Pushing the new branch to a remote server git push origin my_experimental_feature Pulling that branch down...

How to print the alphabet in Rails very easily. ("A".."Z").each {|letter| link_to letter, "/#{letter"} "A".upto("Z") {|letter| link_to letter, "/#letter"}

Have you ever gotten this error message when trying to (re)start Apache httpd not running, trying to start (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down If you are running with ...

I usually change some of the default settings when I use the Paperclip plugin. For most of my projects I don't like having separate directories for each image that is uploaded. I prefer, in this instance, to put avatars of different sizes together under o...

Link_to_function syntax for Haml template. Notice the "|" pipe which will allow for new lines in your code. = link_to_function( "Add Line Item") | {|page| page.insert_html :bottom, :invoice_line_items, | :partial => "line_item", :locals=>{:line_item=...

import hashlib print hashlib.sha1("My wonderful string").hexdigest() print hashlib.md5("My other wonderful string").hexdigest()

class Bar(): def __init__(self, **args): for key in args: self.__dict__[key] = args[key] b = Bar(fullname="Monty Python", email="me@monthpython.org") b.fullname #=> Monty Python b.email #=>me@montypython.org

import zlib regular_string = 'this is my string' compressed_string = zlib.compress(regular_string) decompressed_string = zlib.decompress(compressed_string) print compressed_string print decompressed_string

import pickle entity = { "user_id": "1", "title": "Natural Dog Training", "link": "http://naturaldogtraining.com", } pickled_entity = pickle.dumps(entity) unpickled_entity = pickle.loads(pickled_entity)