arnab

require "java"
require "./lib/weka.jar"

def read_data(filename)
  Java::WekaCoreConverters::ConverterUtils::DataSource.new(filename).get_data_set
end

def normalize(data)
  puts data.first.to_double_array.inspect
  normalizer = Java::WekaFiltersUnsupervisedAttribute::Normalize.new

arnab

Plash App Beta feedback

Download package name and app name should be same. I downloaded NewsAppMagazine and was looking for that after installing. Didn’t find it.

The download should be from plash.in - not a random box.com link

Login screen

Don’t need the “login” word on top of textboxes. The bottom “Login” button is prominent enough call-to-action.

Remember or Remember Me instead of Remember password

Create account screen

Placeholder text should be subtle-r

The date controls in the DOB field are not working. Shows some category dropdown, not dates.

can’t un-specify gender (even though it’s not required)

arnab

;; Now I know what dense means :)

(defn neighbors
  ([size yx] (neighbors [[-1 0] [1 0] [0 -1] [0 1]]
                        size yx))
  ([deltas size yx]
     (filter (fn [new-yx]
               (every? #(< -1 % size) new-yx))
             (map #(vec (map + yx %))
                  deltas))))

arnab

# python manage.py shell

from polls.models import Poll, Choice
p = Poll.objects.all()[0]

import datettime
import random

def pick_random(choices):
    rand_index = random.randint(0, len(choices) - 1)

arnab

virtualenv and django:

PROJECT_NAME=<project_name>
mkvirtualenv $PROJECT_NAME
workon $PROJECT_NAME
pip install django

• Verify you are using django from the virtual-env: which django-admin.py

arnab

        def done_remote(self, result):
            remote_loc = result.split()[0]
            repo_url = re.sub('^git(@|://)', 'http://', remote_loc)

            # Replace the "tld:" with "tld/". See http://rubular.com/r/FK3w7CVnx5
            tld_pattern = r'\.(com|net|org|co\..{2}):'
            repo_url = re.sub(tld_pattern, r'.\1/', repo_url)

            repo_url = re.sub('\.git$', '', repo_url)
            self.repo_url = repo_url

arnab

stuff = (1..10).to_a
# => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

stuff = stuff.detect { |stuff| stuff.even? } ? stuff : 'none found'

#### Ruby 1.8 #######
# => 2
# So, #detect first runs, finds 2 and the result is reassigned into "stuff"
# the ternary operation follows, with "stuff" set to 2

arnab

-- Data from http://download.geonames.org/export/dump/
-- More details at http://download.geonames.org/export/dump/readme.txt
-- Steps at https://gist.github.com/EspadaV8/1357237

DROP TABLE geoname CASCADE;

CREATE TABLE geoname (
    geonameid      INT,
    name           VARCHAR(200),
    asciiname      VARCHAR(200),

arnab

ruby ./get_prices.rb And the Mountains Echoed
search for: And+the+Mountains+Echoed
flipkart: http://www.flipkart.com/search/a/all?query=And+the+Mountains+Echoed
ebay: http://search.ebay.in/And+the+Mountains+Echoed
junglee: http://www.junglee.com/mn/search/junglee?field-keywords=And+the+Mountains+Echoedinfibeam: http://www.infibeam.com/search?q=And+the+Mountains+Echoed


Aggregated reults:
store       title                                                                                       price
==========  ==========================================================================================  ===========

arnab

class ExampleControllerTest < Test::Unit
  # setup etc.

  test "something should do something" do
    get :new
    # assert something
  end
  
  # more tests
end