Dataset pack
Contact handoff
Contacts with optional fields that are often empty or whitespace-only.
Fictional data · UTF-8 CSV, every value quoted so padding and leading zeros survive; empty fields are missing values · free for personal and classroom practice · practise it in Deliver missing, not empty text.
contacts 17 rows × 4 columns
Download contacts.csv (Pro)Data dictionary
- id
- Unique contact ID.
- name
- Name as typed.
- nickname
- Optional nickname.
- phone
- Optional phone number.
Values are shown in quotes so leading and trailing spaces are visible. ∅ means the cell is missing. Exercises are also graded on hidden datasets that are never published.