codesnips

normalization

python 
from sklearn.pipeline import Pipeline
from sklearn.preprocessing import StandardScaler, MinMaxScaler, RobustScaler
from sklearn.linear_model import LogisticRegression

standard_pipeline = Pipeline([
    ('scaler', StandardScaler()),

Scaling and normalization choices for different model families

feature-scaling normalization machine-learning
by Dr. Elena Vasquez 1 tab
ruby 
module EmailNormalization
  extend ActiveSupport::Concern

  included do
    attr_accessor :soft_warnings

Soft Validation: Normalize + Validate Email

rails activerecord validations
by codesnips 4 tabs
ruby 
class CreateTags < ActiveRecord::Migration[7.0]
  def change
    create_table :tags do |t|
      t.string :name, null: false
      t.integer :taggings_count, null: false, default: 0
      t.timestamps

Normalize Tags at Write Time

rails activerecord callbacks
by codesnips 3 tabs
sql 
-- Unnormalized (0NF): Repeating groups
CREATE TABLE orders_bad (
  order_id INT,
  customer_name VARCHAR(100),
  customer_email VARCHAR(100),
  product1 VARCHAR(100),

Database normalization and schema design patterns

database normalization schema-design
by Maria Garcia 2 tabs
ruby 
class User < ApplicationRecord
  normalizes :phone, with: ->(value) { PhoneNormalizer.call(value) }, apply_to_nil: false

  validates :phone,
            presence: true,
            uniqueness: { case_sensitive: false },

Normalizing Phone Numbers on Assignment with Rails normalizes and a Custom Serializer

rails activerecord normalization
by codesnips 3 tabs