miscon:programming.booleans.no-short-circuit · draft · trust low · v0.1.1 · kind undergeneralization

Both operands of and/or are always evaluated

A logical and or or always evaluates both of its operands, whatever the first one turns out to be.

Stable URI: https://open-misconceptions.github.io/miscon-data/m/programming.booleans.no-short-circuit
UUID: 835a754e-f33f-4ab3-88a1-2cc87dc58918
Domain: programming.boolean
Level band: secondary, undergraduate
Locale: en
About: https://open-misconceptions.github.io/miscon-data/c/programming.booleans.short-circuit (Miscon)

Evidence patterns

Pattern 0: predict whether a guarded expression raises an error

predicts an error from the second operand even though the first operand decides the result

Item

items = []
if len(items) > 0 and items[0] == 'x':
    print('yes')
else:
    print('no')

Expectedno

ResponseIndexError

Pattern 1: predict a side effect in the second operand

predicts the side effect happens when the first operand already decides the result

Item

def f():
    print('called')
    return True
result = False and f()

Expected(nothing printed)

Responsecalled

Discriminators

vs a slip. Consistent across items; the learner can state 'it checks both'. A slip is a single wrong prediction.

Relations

conflicts_with: Logical and/or stop evaluating once the result is known (external)
resolved_by: Logical and/or stop evaluating once the result is known (external)

Alignments

progmiscon Java/NoShortCircuit (close-match)
progmiscon Python/NoShortCircuit (close-match)

Provenance

Origin: llm-drafted

Chiodini, L., Moreno Santos, I., Gallidabino, A., Tafliovich, A., Santos, A. L., & Hauswirth, M. (2021). A curated inventory of programming language misconceptions. In Proceedings of the 26th ACM Conference on Innovation and Technology in Computer Science Education (ITiCSE '21), 380-386. doi:10.1145/3430665.3456343
Inventory consulted for the misconception name and scope only; progmiscon publishes no licence for its text, so Open Misconceptions' statements and examples are written independently.
Qian, Y., & Lehman, J. (2017). Students' misconceptions and other difficulties in introductory programming: A literature review. ACM Transactions on Computing Education, 18(1), Article 1. doi:10.1145/3077618

Drafted from the cited literature for the Open Misconceptions seed pack; statement, examples and discriminators are original text. Awaiting maintainer review.

Review status

Status draft, trust low (computed from the reviews below against the reviewer registry).

No reviews yet.

Formats

Raw JSON
CASE 1.1 package (CFItem 835a754e-f33f-4ab3-88a1-2cc87dc58918)
Source on GitHub

Cite

miscon:programming.booleans.no-short-circuit
https://open-misconceptions.github.io/miscon-data/m/programming.booleans.no-short-circuit