I am writing SML program to update records in a list.For example, I have type person_name.
type person_name = {fname:string, lname:string, mname:string}
Then I have person_bio which has person_name embedded in it.
type person_bio = {age:real, gender:string, name:person_name, status:string}
Next I have employee which has person_bio.
type employee = {p:person_bio, payrate:real, whours:real} list;
Now, I have to define function 'updateLastName' by passing the first name.
As of now, created one record 'e1' with below data.
{p={age=40.0,gender="M",name{fname="rob",lname="sen",mname=""},status="M"},
payrate=30.0,whours=10.0}
But I am facing challenge to traverse the list and then updating one field in record.
fun updateLastName(x:string,l:employee)= if (L=[]) then [] else if (x= #fname(#name(#p hd l)) //cheking name of 1st record in list //not getting how to update,this kind of line did not work #fname(#name(#p hd l) = "abc" else updateLastName(x,tl(l)); // hope this is right
Please suggest.
you can implement following approach to get update record
updateLastName {x ="exiting name", b = "you want to update that name"}
it will works.
I am writing SML program to update records in a list.For example, I have type person_name. type ...
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