Functional programming is a programming paradigm which primarily uses functions as means for building abstractions and expressing computations that comprise a computer program.
1
vote
1answer
45 views
Scala: tail-recursive factorial
Is there anything what could be improved on this code?
def factorial(n: Int, offset: Int = 1): Int = {
if(n == 0) offset else factorial(n - 1, (offset * n))
}
The idea is to have tail-recursive ...
2
votes
0answers
21 views
Counting Ways to Make Change — Is this good functional/Lisp style?
I have just started learning some Scheme this weekend. I recently solved a problem that goes something like:
Count the number of ways possible to give out a certain amount of change using
1 5 10 25 ...
3
votes
2answers
83 views
Format names to title case
So I'm writing a program to format names to title case and display them in alphabetic order. Any advice please? And how can i add more methods?
public static void main (String [] args)
{
...
3
votes
1answer
80 views
Help make nested folds look less terse
My Haskell set/map/list folds often become terse and difficult to read. I'm looking for tips on how to make my functional code easier to follow.
I'm working around a bug/feature in a plotting ...
10
votes
4answers
1k views
How to shorten this terrible code?
I am trying to read a line ending in \r\n from a Handle. This is an HTTP header.
I’m fairly new to functional programming, so I tend to use a lot of case expressions and stuff. This makes the code ...
6
votes
3answers
152 views
Overusing JavaScript closures?
I've finally gotten around to learning Lisp/functional programming. However, what I've noticed is that I'm trying to bring ideas back into JavaScript.
Example
Before
var myPlacemark,
...
3
votes
1answer
107 views
Connect Four: Bitboard checking algorithm
I'm rather new to Clojure and so I decided to program a Connect Four for fun and learning.
The code below is a Clojure implementation of this bitboard algorithm.
The whole code can be found here: ...
2
votes
0answers
56 views
simple stupid F# async telnet client
Did I write this code to correctly be tail call optimized? Am I forcing computations more than I need with !? Did I generally write this asynchronously correctly to allow sends and receives to occur ...
4
votes
2answers
99 views
Writing an infinitely running( while(true) { } ) user input function in haskell
I'm trying to implement a lexer in Haskell. For easy console input and output, I've used an intermediate data type Transition Table.
type TransitionTable = [(Int, Transitions String Int)]
type ...
2
votes
0answers
34 views
Calculate FFT from windowed time-based signal
I have a time-based signal (Raw signal) sampled at 6 MHz and need to analyze it in freq. domain.
I'm learning DSP and this is very first time I work with DSP. Could you please help to check if this ...
2
votes
2answers
52 views
Looking for a functional collapse/group-by of this data in ruby
Can anyone come up with a functional (no mutating variables) way in ruby to do the following?
Given this sorted data:
data = [{1 => "A"},
{2 => "B"},
{3 => "B"},
{4 ...
5
votes
3answers
124 views
Scala: a safer way to cut string
I want to get just the first line of a big string. Currently, here's how I do it:
def getFirstParagraph(txt: String) = {
val newLineIdx = txt.indexOf("\n") match {
case i: Int if i > 0 ...
1
vote
2answers
73 views
Safe composition in python
def json_response(response):
assert response.code == 200, 'bad http response'
return json.loads(response.body)
def custom_json_response(response):
response = json_response(response)
...
1
vote
1answer
70 views
Solution to 99 lisp problems: P08 with functional javascript
Solution to 99 lisp problems: P08, with functional javascript
If a list contains repeated elements they should be replaced with a single copy of the element. The order of the elements should not ...
4
votes
2answers
154 views
Change code to use functional style
I tried to solve a programming contest problem in Scala, but I have a feeling, that it could be done in a more functional way. I compared it with the solution written in imperative style and it is not ...
