Is it possible to write functions with dynamically typed input parameters? I tried pattern matching, but apparently it does not work like this. I wish to do something like this: fun firstStr (0,n:string) = n | firstStr (b:string,n:string) = if b>n then n else b; Thank you. ...
Hi all, I'm having some trouble using SML/NJ interactive system, namely, that when I try to use my arrow keys (either left or right to make a correction in the expression I've typed, up to repeat the last expression), my Terminal prints codes. (e.g. ^[[A for up^[[D for left, etc.). While I can still use the system, it makes it very ted...
I'm learning ML, with the SML/NJ dialect. What I'm trying to figure out is if there is a line comment operator. I found the block comment operator, (* ... *), but I really miss line comments. Suggestions? Or am I just stuck with block comments? ...
Basically, I want to have a function to return a polymorphic function, some thing like this: fun foo () = fn x => x So the foo function takes in a value of type unit and returns a polymorphic identity function and the compiler is happy with that, it gives me: val foo = fn : unit -> 'a -> 'a but once I actually call the foo fu...
I need to read file in ML (SLMNJ) and save it in some structures. I need to read some data that points to graph declaration: [( 1 , 2 , 13 ),( 2 , 3 , 3 ),( 2 , 4 , 8 ),( 2 , 5 , 4 ),( 3 , 1 , 5 ),( 3 , 4 , 1 ),( 4 , 6 , 5 ),( 5 , 5 , 5 ),( 6 , 4 , 6 )] (first number: name of the node , secend number: name of connected node , third n...
Hi I need to write SCC algorithm in standard ML. but I don't know how to do that. I have following TYPEs whitch has to be uesd in code: type vertex = int type edge = int * int type graph = (vertex * vertex list) list fun dfs (g: graph) (n: vertex): vertex list = let fun helper (todo: vertex list) (visited: vertex list): vertex ...
I want to read from file but, when I use inputAll or inputLine, it read only 70 character from each line. how can I read from file without limitation ? ...
Possible Duplicate: Open file in ML(SMLNJ) I have a string value which has value like this: "[(1,2,3),(2,3),(6,8)]" -> string but I want to have these values in int type like this: [(1,2,3),(2,3),(6,8)] -> (int list) list what should I do?is there any function which can help me? or I have to do it myself? ...
I have this below function and it works (fn x => x * 2) 2; but for this below one, it is not working (fn x y => x + y ) 2 3; can anyone tell me why? or help give me some hint to get it to work. ...
Hi, I installed the sml interpreter from here : http://www.smlnj.org/, I used the self extracting .EXE for windows. (I'm running windows7 64 bit) Although simple operations on basic datatypes are working, it is not recognising operations on arrays/vectors (update, array constructor etc). Do i need to install something else as well to ma...
how do i prompt for user input in a running function? ...
i need help enumerating all possible combinations of length n given a list of strings. example, if my list was ["r","b","g"] and int 2 answer: r r, r b, r g, b r, b b, b g, g r, g b, g g, ...
Doing this: fun test a 0.0 = "good" | test a b = "bad"; results in an error, but if I change the 0.0 the error goes away. However, I need to match 0.0 and I'm wondering if and how that can be accomplished. ...
Hi I have a program that returns int*int (Example for illustration purposes): fun program(a,b) = (1,2) I want to do something along the lines: fun program(a,b) if a = 0 then (1,2) else val x,y = program(a-1,b) return (x-1, y) Basically, I want to manipulate the tuple that is returned, and then return a modific...
I have the following: val it = DATAX ("hello",DATAX ("world",DATAX #,DATAX #),... Is there a way to make the SMLNJ interpreter expand "#" so that I can see what the exact data is? Thanks! ...
I am stuck at this problem. I have to return the path from one corner to another corner in a graph. for eg if there is a graph with a b c d corners and i need the path from a to d then i need to traverse a graph which is something like a binary tree. Help me with the code someone.. the corner is defined by Corner datattype datatype Corn...