pratikmallya

#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1

pratikmallya

Comprehensions in Python the Jedi way

Beautiful is better than ugly. Explicit is better than implicit.

-- The Zen of Python

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

All of the tasks presented in the examples can be accomplished with the extensive standard library available in Python. These solutions would arguably be more terse and efficient in some cases. I don't have anything against the standard library. To me there is a certain

pratikmallya

heat_template_version: 2014-10-16 

description: |
  Test template for AWS supported resources 

parameters:

resources:
  #ssh_key:
  #  type: OS::Nova::KeyPair

pratikmallya

heat_template_version: 2014-10-16
parameters:
  flavor:
    type: string
    description: Flavor for the server to be created
    default: 4353
    hidden: true
resources:
  test_server:
    type: "OS::Heat::None"

pratikmallya

      #cloud-config
        write_files:
        - path: /root/hello-world.txt
          content: |
            #!/bin/bash
            username=XXXXXX
            APIkey=XXXXXX
            dc=hkg
            container=dn-container
            file=xyz.tar.gz

pratikmallya

heat_template_version: 2014-10-16

description: |
  Creating Rackspace cloud server with user_data.

resources:
  test_server:
    type: "OS::Nova::Server"
    properties:
      name: test-server

pratikmallya

heat_template_version: 2014-10-16

description: |
  Creating Rackspace cloud server with user_data.

resources:
  test_server:
    type: "OS::Nova::Server"
    properties:
      name: test-server

pratikmallya

// include package name here

import (
	"bytes"
	"fmt"
	"os/exec"
	"testing"
)

func TestCodeFormattedCorrectly(t *testing.T) {

pratikmallya

heat_template_version: 2014-10-16

description: |
  Single node linux server with swift signaling.

resources:
  signal_handle:
    type: "OS::Heat::SwiftSignalHandle"

  linux_server:

pratikmallya

heat_template_version: 2013-05-23
parameters:
  count:
    type: number
    default: 4
    description: number of servers

resources:
  rg:
    type: OS::Heat::ResourceGroup