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smlml

isSubstring method in ML

fun appear(x:string,y:string)=
if String.isSubstring x y then print("APPEAR ") else  print("NOT APPEAR ");
appear("abc","asabcbc");

I wrote this function and compiled in Moskow ML.But there is an error like this:

! Unbound value component: String.isSubstring
Solution

  • You are probably using an outdated version of Moscow ML. Try version 2.10 or later, which has String.isSubstring.