Field notes

Alchemist's Journal

Discover insights, tutorials, and stories from the world of alchemy and web development.

Algorithms September 16, 2026 6 min read

Frequency Maps in Java: A Small Pattern with a Big Algorithmic Impact

Learn the frequency map pattern in Java and apply it to counting, anagram, palindrome, permutation, and sliding-window problems with efficient, readable solutions.

Read article 9

Algorithms September 16, 2026 5 min read

Frequency Maps in Elixir: A Small Pattern with a Big Algorithmic Impact

Learn the frequency map pattern in Elixir and use it to solve counting, anagram, palindrome, permutation, and sliding-window problems with clear, efficient code.

Read article 14