5. Data Formatting
создатель Profesor Magallanes

1. Formatting
1.1. Text
1.1.1. mixture of capitalization
1.2. Numbers
1.2.1. coerce?
1.2.2. ignore?
1.2.3. raise?
1.3. Date
1.4. Categories
1.4.1. Use levels correctly
1.4.2. Verify range of ordinal levels