How to apply a function in an iterable list
so I am new to OCaml and im having some trouble with lists.What I have is a List of chars as follows:let letters = [a;b;c;d]I would like to know how can I iterate the list and apply a fuction that...
View ArticleWhy is the parameter implicitly declared in ocaml
I am learning OCaml to get into functional programming. I am solving the beginner exercises.This is the solution of the exercise to get the nth element in a list.let rec at k = function | [] -> None...
View ArticleExtending OCaml Module
Is there any way to add functions to an already existing module in OCaml? Specifically, I have some module Loc that tracks locations in a source file. I also have a module called Ast that represents...
View ArticleIf statements questions in OCaml
I am trying to write the following code in OCaml:let a = 0let b = 1 if a > b then { print_endline "a"; print_endline "a"; }print_endline "b"And then I encountered the following error:File "[21]",...
View ArticleWhat does (string * string) list -> (string -> string) mean?
This might be a super dumb question, but I don't get it.What does(string * string) list -> (string -> string) mean?Especially the last part (string -> string). How can you achieve that?I...
View ArticleWhy does the OCaml function `read_line` have type `unit -> string`?
I understand that its return type is the string that is read but why does it need the parameter of type unit?
View ArticleMake OCaml function polymorphic for int lists and float lists
Is there a way to create a polymorphic add function in OCaml that works equally well for ints and floats? So for example if I have a function like:partialsums [1; 2; 3; 4; 5] I should get [1; 3; 6; 10;...
View ArticleOcaml extlib-1.4 installation
I've tried to install extlib-1.4 but got an error(i'm noob)I typed ocaml install.ml and got:File "bitSet.ml", line 23, characters 40-53:23 | let bcreate : int -> intern = Obj.magic String.create...
View ArticleHow to fold on x elements of list per fold
So, let us say we have some list like as follows: [1; 2; 3; 4; 5; 6], and let us say that I want to fold on 2 elements per call of the function.So, I would apply the function on (1, 2), (3, 4), and (5,...
View Articleprinting a 2D array in ocaml
I have written following code in Ocaml to print 2D array:let string_of_float_arr l = String.concat " " (Array.map string_of_float l)let float_arr_to_string l = String.concat "\n" (Array.map...
View ArticleHow to divide a list of characters (that represents a word) into all possible...
I defined a type "word" as a list of characters. I am trying to write a recursive function "divide_word" that takes one "word" as an argument and returns a list of triplets of all possible (prefix,...
View ArticleDifficulties with Ocaml. Lists
I wrote this function which was supposed to give me the before last element of a list, but it doesn't work? Do you know why? thanks!let rec exo1= match l with |List.length l = 0 or 1 -> failwith...
View ArticleIf i have a list of pairs ex. (String, int) how to add every int in strings...
i have this problem where i have a list of pairs string int and i want to sum the total of ints with the same String ex:list -> [("a",1);("b",1);("a",1);("c",1)] should returnlist ->...
View ArticlePattern matching on rest of list
I'm trying to pattern match on a list of pairs, where I'm trying to return a list from the list of pair, however I'm having trouble figuring out where to make the recursive call. Without the recursive...
View ArticleOCaml How to reverse only even values in list
I want to transefer something like this:[0,1,2,3,4,5,6,7]into[6,1,4,3,2,5,0,7]
View ArticleHow to take product of two list in OCaml?
I have two lists :let a = ["a";"b"];let b = ["c";"d"];I want an output list c such as :c = ["a";"c";"a";"d";"b";"c";"b";"d"];How to do it in ocaml as lists are immutable? I am new to it.
View ArticleHow do I create a dictionary in OCaml that associates to each element of the...
I have two lists, ["0","1"] and ["0","1","0"], and I want to get a list, [(0,2),(1,1)], - which associates to each element of the first list the number of its occurrences in the second list. I tried...
View ArticleHow to append to string in ocaml?
I don't know how to add some string to itself in loop.let parameters = [| [| ("name", "fdjks"); ("value", "dsf") |]; [| ("name", "&^%"); ("value", "helo") |] |] ;;let boundary =...
View ArticleIterating through a string using For loop
I am trying to iterate through the characters of string using for loop however I get the following errorlet str = "Hello"for var=0 to (String.length str -1) do let temp = String.get str vardone;;Error...
View ArticleOcaml function that from a matrix produces a modified matrix
So i have this little function:let switch matrix = for i = 0 to Array.length matrix - 1 do for j = 0 to Array.length (Array.get matrix i) - 1 do if Array.get (Array.get matrix i) j = false then...
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