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Questions tagged [defensive-programming]

Defensive programming is a form of defensive design intended to ensure the continuing function of a piece of software in spite of unforeseeable usage of said software. Defensive programming techniques are used especially when a piece of software could be misused mischievously or inadvertently to catastrophic effect.

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C Syntax Question

Is it considered bad coding to put a break in the default part of a switch statement? A book I was reading said that it was optional but the teacher counted off for using it.
shinjuo
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Will the macro `assert` be removed in C++20?

According to cppreference, assert will be used as a C++ attribute. However, there already exist tons of projects heavily dependent on the macro assert, is there any bad effect?
xmllmx
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How to avoid defensive if conditions in python?

I am writing a code which tries to dig deep into the input object and find out a value lying inside that object. Here is a sample code: def GetThatValue(inObj): if inObj: level1 = inObj.GetBelowObject() if level1: level2…
Sadanand Upase
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Objective-C defensive copying in accessor methods

Coming from a Java background, I'm having trouble figuring out ways to program defensively in Objective-C. Assuming SomeClass is mutable and provides a copy method, this is a typical piece of code I'd write in Java: public MyClass { private…
Dmitry
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GSON vulnerabilities or exploits on deserialization to avoid

I am planning to use gson's fromJson() method to parse a string coming from the browser. Are there any potential vulnerabilities associated with doing that? The data type I am converting to is relatively simple, a List and a boolean. But since gson…
Elijah
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Kotlin: Specify input-constraints in interface

Lets say I have the following interface: interface MathThing { fun mathFunction(x : Int) } Let's say the constraint I want to put onto this function is that x cannot be negative. How can I make sure that every time this (or any other…
Moritz Groß
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How to report error indices in R?

Update: Question here is closed, now discussed on RStudio Community Platform. I'm trying to program defensively in my package development, using a lot input validation. In particular, I'm relying on a lot of the ready-made assertions in checkmate,…
maxheld
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How to defensively create Rx Observables and avoid race conditions?

I was hunting a weird edge case where a list of files in a directory didn't show results for 0...2 files but worked fine for 3...n files. It turned out that the original observable sequence worked just fine. But I used a PublishSubject in one…
ctietze
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Obtaining a reference to an instance whose constructor had thrown an exception

Consider the following issue When designing a framework, an interface exposing some event is presented interface I { event MyEventHandler MyEvent } This interface will eventually be implemented by many different 3rd party vendors, and may be…
Eyal Perry
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Defensive database programming- robust code with T-SQL?

In the application development there is a concept of defensive programming. How to implement defensive programming techniques and writing robust code using Transact-SQL?
juur
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Why is the MVC paradigm best suited for web applications?

I'm fairly certain my professor will ask me why I chose to use MVC for my web application. Truth be told, I'm new to MVC. I read about it, I'm building a blog application using it, I think it's very logical to approach a problem this way. But why?…
delete
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Defensive programming against malicious attacks

The company that I work for is redeveloping an in-house product for external use. The product will initially be developed in C# using WPF, then ported to Silverlight. One of the focus points is coding against malicious attacks e.g. SQL injection…
user173847
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Does User.Identity.Name ever throw?

I notice User.Identity.Name appears to return the empty string when there is no user authenticated, rather than throwing a null reference exception. It is valid to assume User.Identity.Name will never throw? Or should I be checking for null…
fearofawhackplanet
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Defensive anti-multithreading class implementation

I have an object that is not safe for multithreaded applications (in several ways), and I want to provide an internal check to make sure that critical methods are not accessed concurrently. Question What techniques should I employ to detect and…
makerofthings7
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Is this defensive programming?

I've always thought defensive programming was evil (and I still do), because typically defensive programming in my experience has always involved some sort of unreasonable sacrifices based on unpredictable outcomes. For example, I've seen a lot of…
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