armstrongnate

# XCode 5 hides these away:
export C_INCLUDE_PATH="$(xcrun --show-sdk-path)/usr/include"
export CPLUS_INCLUDE_PATH="$(xcrun --show-sdk-path)/usr/include"
export LIBRARY_PATH="$(xcrun --show-sdk-path)/usr/lib:$(xcrun --show-sdk-path)/usr/lib/system:$LIBRARY_PATH"

and then you can do rbenv install

armstrongnate

# t1 and t2 are Time objects
# t is a class with attributes hours, minutes, and seconds

diff = t2 - t1
%w(hours minutes seconds).each do |duration|
  diff -= (t.send("#{duration}=", (diff / 1.send(duration)).round)).send(duration)
end

armstrongnate

epsilon = .000001
x1 and x2 are equal if (fabs(x1 - x2) < epsilon)

armstrongnate

Toast.makeText(getActivity().getApplicationContext(), "in onResume",
        Toast.LENGTH_LONG).show();

armstrongnate

// formatting numbers

// => "1.2"
String.format("%s", new DecimalFormat("#.##").format(1.2))

// => "1.20"
String.format("%.2f", 1.2)

armstrongnate

class Post < ActiveRecord::Base
  has_many :post_tags
  has_many :tags, through: :post_tags
end

armstrongnate

import Foundation

let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let userPasswordString = "username@gmail.com:password"
let userPasswordData = userPasswordString.dataUsingEncoding(NSUTF8StringEncoding)
let base64EncodedCredential = userPasswordData!.base64EncodedStringWithOptions(nil)
let authString = "Basic \(base64EncodedCredential)"
config.HTTPAdditionalHeaders = ["Authorization" : authString]
let session = NSURLSession(configuration: config)

armstrongnate

## One way to do it is from the rails console:
require 'db/migrate/MIGRATION_FILE_NAME.rb'

# if using def change
MigrationClass.new.migrate(:down)

# if using up or down
MigrationClass.up

## Another way is using a rake task

armstrongnate

Editing

Command(s)	Description
o and O	insert new line below and above respectively.
dd	delete current line
x	delete highlighted character
shift+x	delete character to left
dw	delete a word
de	delete to end of word
/	to search, then n or N to go forward and back in results

armstrongnate

Bash inside of ubuntu image

docker run -it -v /Users:/Users ubuntu bash

On boot

boot2docker up