Why short-circuit evaluation is bad?

Why short-circuit evaluation is bad?

when is short-circuit evaluation bad? is simply: when it violates backwards compatibility. Ok, now you can say VB.NET is not very backwards compatible to old VB6 or VBA, however at least certain parts of the language are.

Is short circuiting good?

A short circuit happens because the result is clear even before the complete evaluation of the expression, and the result is returned. Short circuit evaluation avoids unnecessary work and leads to efficient processing.

Where is short-circuit evaluation useful?

Short-circuit evaluation means that when evaluating boolean expressions (logical AND and OR ) you can stop as soon as you find the first condition which satisfies or negates the expression.

What is short circuit evaluation in C?

Short-Circuit Evaluation: Short-circuiting is a programming concept by which the compiler skips the execution or evaluation of some sub-expressions in a logical expression. The compiler stops evaluating the further sub-expressions as soon as the value of the expression is determined.

Does C do short-circuit evaluation?

In imperative language terms (notably C and C++), where side effects are important, short-circuit operators introduce a sequence point – they completely evaluate the first argument, including any side effects, before (optionally) processing the second argument.

What is short-circuit evaluation given an example to explain it?

A short circuit operator is one that doesn’t necessarily evaluate all of its operands. Take, for example, the operator &&. Evaluate 0 == 1, discovering that 0 == 1 is false. Realize that the condition (0 == 1 && whatever) can’t possibly be true, no matter what the whatever condition happens to be.

Is it good practice to exploit short circuit evaluation?

“Good practice” – NO. As your peers may not be as intelligent as you are. But yes, in some languages (I’d dare say, Perl), That is a common idiom. But “exploiting” short circuit evaluation – if it was considered good practice,

Why do you use short circuiting when you want an IF statement?

Using short-circuiting makes code difficult to read. An if statement clearly communicates that the code should only be run if a condition is fulfilled. But using a logical operator for the same purpose is just confusing. This problem is made worse by how difficult it is to Google for this behavior.

Why was short circuiting added to the programming language?

Short circuiting was added as a means to improve performance when evaluating a boolean expression. Using it as a form of control flow can lead to confusion many people will not expect evaluating an expression to have a side effect. In most cases, being more explicit about what you are doing is better for readability.

When to use short circuiting in JavaScript?

When JavaScript stops evaluating the operands of the AND operator, that’s called short-circuiting. Short-circuiting is a useful behavior to avoid unnecessary computations. However, it can be misused to create the same behavior as an if statement.