Recent questions tagged language

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language agnostic - Secret santa algorithm

Every Christmas we draw names for gift exchanges in my family. This usually involves mulitple redraws until no one ... , and one edge leaving. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language lawyer - Program being compiled differently in 3 major C++ compilers. Which one is right?

As an interesting follow-up (not of big practical importance though) to my previous question: Why does C++ ... typedef seems kind of weird) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - What is the structure of a MIDI file?

I want to manually have a function that creates a MIDI file according to users demands, for example. User write ... write it. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - How to draw a n sided regular polygon in cartesian coordinates?

I have been trying to figure out how to write a simple program to compute the x,y points for creating a ... primitives other than line drawing. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - How would you calculate all possible permutations of 0 through N iteratively?

I need to calculate permutations iteratively. The method signature looks like: int[][] permute(int n) For n = ... ways to doing it iteratively. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Why is reflection called reflection instead of introspection?

What is the origin of the term reflection? It seems more like introspection. Why isn't it called that ... in consideration or meditation. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Writing "unit testable" code?

What kind of practices do you use to make your code more unit testing friendly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - How Could One Implement the K-Means++ Algorithm?

I am having trouble fully understanding the K-Means++ algorithm. I am interested exactly how the first k centroids ... which one is for what. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - What should NOT be under source control?

It would be nice to have a more or less complete list over what files and/or directories that shouldn't (in most cases) ... files - .*.sw? - *~ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - When should the Singleton pattern NOT be used? (Besides the obvious)

I know well that you want to use Singleton to provide a global point of access to some state or service. The ... you want to use a Singleton? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - What is a programming idiom?

I see the phrase "programming idiom" thrown around as if it is commonly understood. Yet, in search results and ... the others valid as well? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Why is the knapsack problem pseudo-polynomial?

I know that Knapsack is NP-complete while it can be solved by DP. They say that the DP solution is pseudo- ... -polynomial thing to me slowly ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - What is Map/Reduce?

I hear a lot about map/reduce, especially in the context of Google's massively parallel compute system. What exactly is it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Algorithm for creating a school timetable

I've been wondering if there are known solutions for algorithm of creating a school timetable. Basically, it's ... or hints for developing it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Why are leading zeroes used to represent octal numbers?

I've always wondered why leading zeroes (0) are used to represent octal numbers, instead of — for example ... ) behind this design choice? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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370 views

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language lawyer - C++ operator % guarantees

Is it guaranteed that (-x) % m, where x and m are positive in c++ standard (c++0x) is negative and equals ... it's right on all machines I know. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - What is the difference between "image/png" and "image/x-png"?

What is the difference between "image/png" and "image/x-png"? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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607 views

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language agnostic - Determine RGBA colour received by combining two colours

I have two colours defined as RGBA (in my specific examples, one of the set is [white with alpha 0.85] and ... too many. Any pointers? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language design - Why do C# and Java bother with the "new" operator?

Why does the new operator exist in modern languages such as C# and Java? Is it purely a self documenting code ... did they choose this syntax? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Planning for efficiency early vs Premature optimization

I seem to notice two schools of thought emerging in regards to optimization: Premature optimization is the root of ... can co-exist peacefully? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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language agnostic - Is there a known implementation of an indexed linked list?

My gut tells me there is no good way to achieve this, but, unlike Mr. Stephen Colbert, I'd rather trust a ... see here, here, and here." See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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551 views

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language agnostic - Efficient Algorithm for String Concatenation with Overlap

We need to combine 3 columns in a database by concatenation. However, the 3 columns may contain overlapping parts ... return sb.toString(); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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427 views

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language agnostic - Why can't an object of abstract class be created?

Here is a scenario in my mind and I have googled, Binged it a lot but got the answer like "Abstract ... create object of an Abstract class? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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501 views

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language agnostic - Should I use `!IsGood` or `IsGood == false`?

I keep seeing code that does checks like this if (IsGood == false) { DoSomething(); } or this if ... any performance difference between the two? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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459 views

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language design - Why is F#'s type inference so fickle?

The F# compiler appears to perform type inference in a (fairly) strict top-to-bottom, left-to-right fashion. This ... F# that is causing this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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501 views

1 answer

language design - Why are there no sorted containers in Python's standard libraries?

Is there a Python design decision (PEP) that precludes a sorted container from being added to Python? ( ... ordered by insertion order.) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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469 views

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language agnostic - XOR of three values

What is the simplest way to do a three-way exclusive OR? In other words, I have three values, and I want a statement ... && !(a && b)) => false See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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406 views

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language agnostic - What is a predicate?

Being a hobbyist coder, I'm lacking some fundamental knowledge. For the last couple days I've been reading ... an explanation on the subject. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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