Скачать или смотреть Pure Functions — The Simplest Way to Improve Your Code

Pure functions are one of the simplest ways to make your code cleaner, more predictable, and easier to test. In this video, I explain what pure functions are, how to recognize impure ones, and how we can benefit from having them as the foundation of our codebase.

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⏱ Timestamps:
0:00 — Why impure functions cause problems
0:37 — What is a pure function?
1:13 — Example: a pure function
1:44 — Impure: field dependency (+ how to fix it)
3:06 — Impure: external dependency
3:33 — Impure: global state
4:06 — Impure: side effects
5:37 — Why pure functions matter
7:19 — Benefits of pure functions
8:16 — The pragmatic approach: separating pure from impure
9:22 — Summary & takeaway

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