one fable-low hijack cell
pair pure / side_effecting
envelope en_pipe
ordering AB
effort low
English with pipe '|' — '{X} | {Y}'
verdictpicked pure (first-offered)
· classifierA
· tiernone
response (200 chars)
# Pure vs. Side-Effecting Functions
## Pure Functions
A function is **pure** if it:
1. **Always returns the same output for the same input** (deterministic)
2. **Has no observable side effects** — it
neighbors