Short-circuit evaluation
Short-circuit evaluation is an evaluation strategy that skips remaining operands or processing when the result is already determined.
ASP.NET Core in Action, 3e
A short circuit is the termination of request-processing pipeline execution by returning a result without invoking the remaining components.
- How it is used
- Stops endpoint, MVC, or Razor Pages processing when a filter can produce the response without invoking later pipeline stages.
- How deep it goes
- Explains continuation, filter order, stage-specific bypass, and earlier-filter callbacks, while deferring some result-filter details.
- Examples
- Demonstrates invalid identifier validation, a Problem Details response, ordered logging filters, and a minimal API returning fruit data.
- What you can do after
- Apply it via endpoint or MVC filters by returning a result before invoking the remaining pipeline.
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Clojure: The Essential Reference
Short-circuit evaluation is an evaluation strategy that skips operands whose results cannot affect the overall logical result.
- How it is used
- Uses left-to-right operand skipping to end logical chains once their result is determined.
- How deep it goes
- Details return values, zero-argument cases, practical guards, and macro expansion rather than a general evaluation model.
- Examples
- Demonstrates file-path guarding, a default server port, predicate filtering, and spam detection.
- What you can do after
- Apply it via Clojure `and` and `or` for guards and defaults, or via `every-pred` and `some-fn` for combined predicates.
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100 Java Mistakes and How to Avoid Them
A short-circuit operator is a Java boolean operator that skips evaluation of its right operand when the result is already determined by the left operand.
- How it is used
- Prevents incorrect conditions, unnecessary computation, and runtime exceptions caused by eager boolean evaluation.
- How deep it goes
- Explains operand evaluation, compound-assignment behavior, and precedence hazards through focused Java examples.
- Examples
- Uses array bounds checks, chained validation calls, mixed logical conditions, and independently evaluated update methods.
- What you can do after
- Diagnose/debug with it by spotting eager operators and rewriting conditions or assignments that should skip later operands.
Read how 100 Java Mistakes and How to Avoid Them explains short-circuit evaluation →
Related concepts
- non-short-circuit operatorcontrasts with · A non-short-circuit operator is a Java boolean operator that evaluates both operands regardless of whether the left operand already determines the result.
- truthinessuses · Truthiness is a programming language’s rule for interpreting values as true or false in a Boolean context.
- logical AND operatorused by · A logical AND operator is a Boolean conjunction that produces true exactly when all operands have true truth values.
- authorization filterused by · An authorization filter is a request-processing component that evaluates authorization rules before allowing or rejecting access to protected functionality.
- anyused by · Any is a Rust trait that supports runtime type identification and checked conversion of suitable values to concrete types.
- boolean operationcontrasts with · A Boolean operation combines or transforms truth-valued inputs according to logical rules to produce a truth-valued result.
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