78 questions linked to/from Things to avoid when writing challenges
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### Should we disallow non-observable requirements?

One of the more recent things to avoid that's coming up a lot is the use of non-observable requirements. The most common incarnations of this are things like "no hardcoding", "implement this algorithm"...
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### Is the empty string an acceptable decimal representation of 0?

In a recent question for which the correct output for 1 is zero, an answer output ; i.e, nothing. Is this an acceptable base-10 ...
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### Do submissions have to be answered with a programming language?

We've got various answers strewn across meta that tell different stories: On the standard loopholes, we disallow answers that aren't programming languages. This appears to be the most definitive ...
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### Does output count if part of it scrolls off the screen?

Let's consider a QBasic solution to FizzBuzz. The code works correctly, printing the required output from 1 all the way up. The problem is, since there's a lot of ...
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### Challenge post-mortems

While to-be-posted challenges get feedback in the Sandbox (ideally), we don't usually reflect on challenges after they have run. And while issues and ambiguities in challenges do get pointed out, we ...
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### May dc take negative input as it's designed to?

In the language dc, the - character is reserved strictly for subtraction, so it cannot be used to enter a negative number. An ...
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### The broken window of “Produce the number 2014 without any numbers in your source code”

Produce the number 2014 without any numbers in your source code is our highest-voted question. It regularly inspires newcomers to pose similar challenges, which get heavily downvoted with the poster ...
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### Challenge Type System

A very common task in writing a challenge is to define the allowed input/output types. These descriptions have a couple of problems as I see them: They can get really verbose. If I want somebody to ...
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### Can Halting be considered output?

I am currently designing a language that cannot halt unless it all of its memory is cleared, this means for any practical application it has no output whatsoever. However when the program does halt ...
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### Closing old question as duplicate of a new one

What is our policy regarding closing an old challenge as a duplicate of a new one? I know this happens on other sites (at least SO), if the newer question is generally better or usually if it gathers ...
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### What's wrong or unclear with this challenge?

This morning I posted a challenge (2k users only). It's back in the sandbox now, visible for anybody and for review. I had this challenge in the sandbox for 5 days before I posted it. With some help ...
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### Explaining a challenge only with test cases and examples

I have a slightly problem. I want to post a challenge (to the sandbox) about building a matrix with X pattern. The problem is that I don't know how to explain it using technical words or ...
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### On-topic to ask for help with an pre-existing code golf challenge from another site?

There is a code golf challenge on a foreign (not related to Stack Exchange) site with which I have a problem. The challenge is designed for Python 3 and has a length limit of 150 characters. I ...