reduce-nesting

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更新日2026年7月12日 12:09

Flatten deeply nested conditionals into readable, early-return code. Use on any function with 3+ levels of indentation.

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YaoYinYing

YaoYinYing/REvoDesign

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Reduce Nesting

Deep nesting hides bugs in the branches you didn't read.

Guard clauses — handle the invalid/edge cases first and return early. The happy path drops to the left margin.
Invert conditions — if (!valid) return; instead of wrapping the whole body in if (valid) {...}.
Extract — a nested block doing one thing becomes a named function.
Replace flag-then-branch — return the result directly instead of setting a variable to return later. Target: no function deeper than 2-3 levels. If you still need more, the function is doing too much — split it.

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name	reduce-nesting
description	Flatten deeply nested conditionals into readable, early-return code. Use on any function with 3+ levels of indentation.
when_to_use	arrow-shaped code, 3+ nested ifs, a function that's hard to follow

Reduce Nesting

Deep nesting hides bugs in the branches you didn't read.

Guard clauses — handle the invalid/edge cases first and return early. The happy path drops to the left margin.
Invert conditions — if (!valid) return; instead of wrapping the whole body in if (valid) {...}.
Extract — a nested block doing one thing becomes a named function.
Replace flag-then-branch — return the result directly instead of setting a variable to return later. Target: no function deeper than 2-3 levels. If you still need more, the function is doing too much — split it.