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Software developer and science fiction fan.


2d
comment Logic for String Expansion
This is probably a question for stackoverflow. Also: what have you tried?
May
27
comment What makes functional programming languages declarative as opposed to Imperative?
@Brendan I don't think functional programming is a subset of imperative programming (nor is immutability a mandatory trait of FP). It can be argued that in the case of pure, statically-typed FP, it's a superset of imperative programming where effects are explicit in the types. You know the tongue-in-cheek assertion that Haskell is "the world's finest imperative language" ;)
May
26
comment What makes functional programming languages declarative as opposed to Imperative?
@ALXGTV You can indeed see functional programming as a superset of imperative programming. Your example with Clojure doesn't show reassignment; instead, it's an example of introducing new bindings with the same name (aka "shadowing"). The difference with imperative reassignment is that this effect is not seen outside the scope of the shadowing, whereas if you truly reassigned x, other parts of your function would see the change.
May
26
comment What makes functional programming languages declarative as opposed to Imperative?
@ALXGTV Your intuition is correct: declarative programming "just" provides a higher level of abstraction over certain imperative details. I'd argue this is a big deal!
May
26
comment fortran 95 help please. crazy eight
You seem to have a problem? Perhaps next time you could try explaining what the problem is?
May
26
revised Taking strong, static typing to an extreme?
removed irrelevant tag
May
24
comment Detecting similar sets
And how do you want to group the sets? So far I see "if one set is a subset of the other". But what is the "reasonable correlation" you mention later? Maybe you should define this function.
May
24
comment Would it be good to have a readonly modifier for method level variables?
(Cont'd) It doesn't add much visual clutter and it helps add clarity to the intent of the code. It's very similar to Scala's val, which is mandatory (unless using var, of course).
May
24
comment Would it be good to have a readonly modifier for method level variables?
I use final in Java everywhere I can, and have introduced this style to my team. It greatly helps in understanding code. Often, while introducing final to local variables, I discover unintented/error-prone reassignments of the variable. In turn, correcting this often tends to refactoring the whole mess. I also introduced using final in all method arguments, no exceptions allowed.
May
24
comment Detecting similar sets
I have to agree with @Ixrec that this question isn't clear. Can you give concrete examples? The problem is probably interesting if you can formulate it. Otherwise we're guessing.
May
20
revised Software paradigms: prove that sum and sum1 are equal
added a more appropriate tag; still better would be "induction" or "proof" ("scala" hs nothing to do with this question)
May
19
revised Software paradigms: prove that sum and sum1 are equal
code formatting
May
19
comment Software paradigms: prove that sum and sum1 are equal
An idea: prove by induction that k + sum1(xs, 0) = sum1(xs, k). Then use it in the step you're currently stuck.
May
14
comment Is it possible to Style a csv file?
@quangphan Java is irrelevant for this question. You can't style a CSV (unless you use proprietary extensions), regardless of what programming language you are using to write it.
May
9
comment JUnit Testing in Multithread Application
Please note that these tests won't prove your concurrency issues don't exist anymore. They simply exercise your threads more, and therefore increase the chance of finding concurrency problems if they are there; but I'm afraid this is still no guarantee. Finding and troubleshooting concurrency problems is unfortunately very hard.
May
9
comment JUnit Testing in Multithread Application
JUnit is not only used for unit testing, but also for integration testing. It's very hard to unit test concurrency problems, and the OP doesn't seem to be asking about unit testing, but about automated (integration) testing.
May
7
comment Why is .compareTo() in an interface while .equals() is in a class in Java?
possible duplicate of Java: why is there a Comparator interface but no Hasher and Equator?
May
7
revised Should we define types for everything?
Removed irrelevant tags; the question isn't about OOP or FP, but just about type systems
May
6
comment Why is Lisp useful?
The article by Paul Graham is interesting because, save for a couple of items, most languages these days seem to have the features he lists. So maybe Lisp was more compelling back in those days; nowadays it's more valuable as the language that introduced those features?
Apr
17
comment What exactly makes the Haskell type system so revered (vs say, Java)?
+1 Great answer! This is very powerful and often underappreciated by newcomers to Haskell. By the way, a simpler "impossible" function would be fubar :: a -> b, wouldn't it? (Yes, I'm aware of unsafeCoerce. I assume we aren't talking about anything with "unsafe" in its name, and neither should newcomers worry about it! :D)