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Theodor Fiedler

PROFILE

Theodor Fiedler

Over a three-month period, Timo Fiedler-Dejanze enhanced the elixir-lang/elixir repository by focusing on core date and time functionality. He delivered a feature that expanded the Date.range/3 API to accept durations and keyword lists, enabling more flexible date range creation. His technical approach involved updating type specifications, adding new function clauses, and writing comprehensive tests in Elixir. Timo also addressed two bugs: one improved date shifting correctness by ignoring microsecond precision, and another preserved microseconds in DateTime.diff/3, ensuring accurate high-resolution time calculations. His work demonstrated depth in backend development, API design, and core library maintenance using Elixir.

Overall Statistics

Feature vs Bugs

33%Features

Repository Contributions

3Total
Bugs
2
Commits
3
Features
1
Lines of code
146
Activity Months3

Work History

February 2025

1 Commits

Feb 1, 2025

February 2025 — Core DateTime accuracy improvements in elixir-lang/elixir. Delivered DateTime.diff/3 microsecond precision preservation, enhancing high-resolution time interval calculations and overall reliability of time-based logic in the standard library.

January 2025

1 Commits • 1 Features

Jan 1, 2025

January 2025 - Monthly summary focusing on key accomplishments, with a concise view of features delivered, major fixes, impact, and technology skills demonstrated.

November 2024

1 Commits

Nov 1, 2024

2024-11 Monthly Summary for elixir-lang/elixir. Focused on improving date/time correctness in core utilities by addressing edge cases in date shifting. Delivered a targeted bug fix to ignore microsecond precision in date duration calculations, accompanied by tests to prevent regressions. No user-facing features released this month; the work enhances reliability and correctness of date arithmetic for downstream users and libraries.

Activity

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Quality Metrics

Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

Elixir

Technical Skills

API DesignBackend DevelopmentCore LibrariesDate and Time ManipulationElixirElixir DevelopmentTesting

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

elixir-lang/elixir

Nov 2024 Feb 2025
3 Months active

Languages Used

Elixir

Technical Skills

Backend DevelopmentElixirAPI DesignDate and Time ManipulationElixir DevelopmentTesting

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