adamjmurray

# Environment, set GEM_HOME & GEM_PATH. For example, we can launch JRuby like this:
# GEM_HOME=/Users/amurray/tmp/gems/ GEM_PATH=/Users/amurray/tmp/gems java -jar ~/Downloads/jruby-complete-1.7.0.preview1.jar -S irb

# =====================
# LISTING gems   
puts Gem::Specification.find_all.to_s
puts Gem::Specification.find_all.map{|spec| "#{spec.name} (#{spec.version})" }

# =====================
# USING (a specific version of) gems 

carlwolff

- name: create user $user
  action: user name=$user

- name: download rbenv-installer for $user
  action: get_url url=https://raw.github.com/fesplugas/rbenv-installer/master/bin/rbenv-installer dest=/tmp/rbenv-installer mode=0755

- name: run rbenv-installer
  action: raw HOME=/home/$user /tmp/rbenv-installer

- name: copy rbenv environment setup

machty

Update 6/14/13

• see https://gist.github.com/machty/5723945 for the latest API (unlikely to change from now on)
• latest Ember build: https://machty.s3.amazonaws.com/ember/ember-async-routing-10.js

Router Facelift Examples

Guide to latest API enhancements router.js PR Ember PR

celoyd

#!/usr/bin/env python

# ndvi.py red.tif nir.tif output-ndvi.tif
# Calculate NDVI (see Wikipedia). Assumes atmospheric correction.
# (Although I use it without all the time for quick experiments.)

import numpy as np
from sys import argv
from osgeo import gdal, gdalconst

andybega

# from here http://blog.55minutes.com/2013/09/postgresql-93-brew-upgrade/

# Create backup of database
/usr/local/cellar/postgresql/9.2.4/bin/pg_dump -h localhost -p 5432 -U ab428 -Fc -b -v -f "/usr/local/var/pg_backup/afghanistan.backup" afghanistan

# Upgrade PostGIS
brew doctor  # fix errors
brew update
brew upgrade postgres
brew upgrade gdal --with-postgres

wycats

App.Router.map(function() {
  this.resource('post', { path: '/posts/:post_id' });
});

App.PostRoute = Ember.Route.extend({
  model: function(params) {
    return this.store.find('post', params.post_id);
  }
});

peterc

require 'stringio'
require 'timeout'

class Object
  def methods_returning(expected, *args, &blk)
    old_stdout = $>
    $> = StringIO.new

    methods.select do |meth|
      Timeout::timeout(1) { dup.public_send(meth, *args, &blk) == expected rescue false } rescue false

christopheranderton

Description

PLEASE SCROLL DOWN AND READ THE COMMENTS FOR A MORE UP TO DATE WAY (AND EASIER) TO DO THIS
When using Homebrew (http://brew.sh) and searching formulas or pull requests you may get the dreaded error message: Github API Rate limit exceeded

Let's fix that! (yeah!)

---

Short version

PLEASE SCROLL DOWN AND READ THE COMMENTS FOR A MORE UP TO DATE WAY (AND EASIER) TO DO THIS

stuart11n

git branch -m old_branch new_branch         # Rename branch locally    
git push origin :old_branch                 # Delete the old branch    
git push --set-upstream origin new_branch   # Push the new branch, set local branch to track the new remote

Envek

# Enables PostgreSQL interval datatype support (as ActiveSupport::Duration) in Ruby on Rails 4.1.
# Based on https://gist.github.com/clarkdave/6529610

require 'active_support/duration'

# add a native DB type of :interval
ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::NATIVE_DATABASE_TYPES[:interval] = { name: 'interval' }

# add the interval type to the simplified_type list. because this method is a case statement
# we can't inject anything into it, so we create an alias around it so calls to it will call