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Cleaning up old ECR images

A process to delete old ECR images using the aws CLI tool and jq.

The general idea is to use aws ecr describe-images to enumerate the images, and aws ecr batch-delete-image to delete them. The latter command can take a --cli-input-json argument specifying a JSON file which lists the images to delete. jq is used to filter describe-images to only the old ones, and munge it into the format that batch-delete-image expects. Unfortunately, batch-delete-image supports a maximum of 100 images at a time, so the process may need to be repeated several times.

Limitations:

• I can't find a way to do this as a neat command line pipeline. --cli-input-json seems to require that the input comes from a file, rather than STDIN. (AWS CLI tracking issue: aws/aws-cli#3209)
• Since batch-delete-image can only handle 100 images at a time, the jq command slices to [0:100] after filtering to just the old images. This means the process may have to be re

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require 'ostruct'

class Object
  def expect(value)
    @expector = Expector.new(value)
  end

  def eq(val)
    [:==, val]
  end

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class CreateOrganizations < ActiveRecord::Migration
  def change
    create_table :organizations do |t|
      t.string :name
      t.boolean :has_octocats

      t.timestamps
    end
  end
end

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Model.joins(:relation)
  .merge(Relation.scope)
  .count(group: 'column or postgres function', 
    order: 'count_all DESC', 
    limit: 10
  )

# Note: the count_all is the 'AS' variable ActiveRelation makes for you.

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haha

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# RSpec 2.0 syntax Cheet Sheet by http://ApproachE.com

# defining spec within a module will automatically pick Player::MovieList as a 'subject' (see below)
module Player
	describe MovieList, "with optional description" do
		  
	  it "is pending example, so that you can write ones quickly"
	  
	  it "is already working example that we want to suspend from failing temporarily" do
		pending("working on another feature that temporarily breaks this one")

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<%= form.select :shipping_method, shipping_methods_for_select(@order) %>

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<%= form.select :shipping_method, shipping_methods_for_select(@order) %>

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From HN thread here: http://news.ycombinator.com/item?id=2222228
Challenge posed here: http://blog.hackensplat.com/2011/02/vinegar.html

It seems the cipher is an application of viginere four times. So, if the original 
17 character key is x1 x2 y1 y2 y3 z1 z2 z3 z4 z5 t1 t2 t3 t4 t5 t6 t7, and the 
original text is C1 C2 C3 C4, then the ciphertext we're given of IWY SEIX.... 
can be thought of as follows:

I = (C1+x1+y1+z1+t1)
W = (C2+x2+y2+z2+t2)

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/* Solves one of those triangle shaped peg jumping puzzles.
   You begin with a board composed of n rows, where the i-th
   row contains i columns. e.g.:
       X
      X X
     X X X
   The board begins with pegs in all holes but one. A peg can
   jump over another peg if it can land in a hole on the other
   side. The jumped peg is removed. The goal is to finish with
   a single peg remaining.