The JavaScript warning “unreachable code after return statement” occurs when using an expression after a return statement, or when using a semicolon-less return statement but including an expression directly after.
Why would code be unreachable?
Unreachable code is an atom or sequence of atoms which cannot be executed because there is no way for the flow of control to reach that sequence of atoms. For example, in the following atom sequence the MUL, SUB, and ADD atoms will never be executed because of the unconditional jump preceding them.
How do you fix unreachable statements?
1(a) is compiled, line 12 raises an unreachable statement error because the break statement exits the for loop and the successive statement cannot be executed. To address this issue, the control flow needs to be restructured and the unreachable statement removed, or moved outside the enclosing block, as shown in Fig.
How do I stop unreachable code?
// as unreachable code. Have an infinite loop before them: Suppose inside “if” statement if you write statements after break statement, then the statements which are written below “break” keyword will never execute because if the condition is false, then the loop will never execute.
What is the difference between dead code and unreachable code?
MISRA C defines unreachable code as code that cannot be executed, and it defines dead code as code that can be executed but has no effect on the functional behavior of the program.
What is considered dead code?
In some areas of computer programming, dead code is a section in the source code of a program which is executed but whose result is never used in any other computation. The execution of dead code wastes computation time and memory.
What is unreachable exception?
A block of statements to which the control can never reach under any case can be called as unreachable blocks. Unreachable blocks are not supported by Java. The catch block mentioned with the reference of Exception class should and must be always last catch block because Exception is the superclass of all exceptions.
Is unreachable statement a compile error?
An unreachable Statement is an error raised as part of compilation when the Java compiler detects code that is never executed as part of the execution of the program. Such code is obsolete, unnecessary and therefore it should be avoided by the developer.
In which type of testing unreachable code would be found?
Explanation: Code review is a software quality assurance activity in which one or several humans check a program mainly by viewing and reading parts of its source code, and they do so after implementation or as an interruption of implementation.
What does unreachable code mean in solidity?
Unreachable code, a part of the source code that will never be executed due to inappropriate exit points/control flow.
How do you bar call on Safaricom line?
To bar all incoming calls except home calls (when roaming): To activate this feature, you can dial *332*0000#, followed by *#332# to confirm if the subscription is successful. To bar all outgoing calls: Dial *33*0000#. Then confirm by dialing *#33# on your Safaricom line.
What is unreachable code in react?
The JavaScript warning “unreachable code after return statement” occurs when using an expression after a return statement, or when using a semicolon-less return statement but including an expression directly after.
What does it mean when something Cannot be resolved to a variable?
If you try, the cannot be resolved to a variable error will come out. It means it cannot detect the initialization of variables within its scope. Similarly, if you make a private variable, you cannot call it inside a constructor.
What is finally block in Java?
The finally block in java is used to put important codes such as clean up code e.g. closing the file or closing the connection. The finally block executes whether exception rise or not and whether exception handled or not. A finally contains all the crucial statements regardless of the exception occurs or not.
In which type of testing unreachable code would be found?
Explanation: Code review is a software quality assurance activity in which one or several humans check a program mainly by viewing and reading parts of its source code, and they do so after implementation or as an interruption of implementation.
What is unreachable code in react?
The JavaScript warning “unreachable code after return statement” occurs when using an expression after a return statement, or when using a semicolon-less return statement but including an expression directly after.
How can solve unreachable code in C++?
Just add a premature return while working on the code in the function or the code calling the function.
What does unreachable code mean in solidity?
Unreachable code, a part of the source code that will never be executed due to inappropriate exit points/control flow.
How do I find my dead code?
The quickest way to find dead code is to use a good IDE. Delete unused code and unneeded files. In the case of an unnecessary class, Inline Class or Collapse Hierarchy can be applied if a subclass or superclass is used. To remove unneeded parameters, use Remove Parameter.
Why does dead code occur?
Dead code arises due to software maintenance and software aging. For example, a new fragment of code might make another code fragment dead. Developers are either unaware of this or think that such code may be needed again someday.
Should dead code be removed?
Removing such code has several benefits: it shrinks program size, an important consideration in some contexts, and it allows the running program to avoid executing irrelevant operations, which reduces its running time. It can also enable further optimizations by simplifying program structure.
What is Zombie code?
“Zombie code is an expression used to describe software functionality that is more or less abandoned or unsupported but which still appears in the current source code,” explains Daniel Stubbs, scientific analyst at Calcul Quebec and part of the Compute Canada Federation.
