CIS 505 Exam 1 Notes Study Guide |Complete Questions with 100% Correct Answers

CIS 505 Exam 1 Notes Study Guide |Complete Questions with 100% Correct Answers How do signify a real in SML? 12.0, 3e~2, 3,14e12 How do you signify a character in SML? #"x", #"A", #n" How do you concatenate two strings in SML? Using the ^ operator i.e. "abra" ^ "cadabra" = "abracadabra" What operators can you not use on reals? =, <> Can < and > be used on strings? Yes, and it means lexicographically precedes. It returns a bool i.e. "a" < "b", "abc" < "acb" What are the 3 boolean operators? not, andalso, orelse SML has what two types of typing? Static and Strong How to cast as a real in SML? real(11) = 11.0 How to round down, round up, round generally, and truncate? floor(5.4) = 5 ceiling(5.4) = 6 round(5.5) = 6 trunc(~5.4) = ~5 How to go from character to int? Vice-versa? ord(#"0") = 48 chr(48) = #"0" What is a tuple? A fixed-size ordered collection of two or more values. Always same length, sometimes different types Ex: (1, "a", true) (4, (1,"a",true)) What is a list? A list is a list of all the same type. Always same type, sometimes different length What are the return types of these list operations? Empty List [] Head hd Tail tl Append @ cons :: 'a list 'a list→'a 'a list→'a list 'a list*'a list→'a list 'a*'a list→'a list What do explode and implode to? Explode takes a string and converts it into a list of characters Implode takes a list of characters and makes it a string Fill in the blanks: SML is a(n) __________________-based (________________) language with ___________, ____________ typing SML is an expression-based(functional) language with strong, static typing. Write a basic function that takes in a number and adds one fun inc(x) = x+1; What does tl return? All the elements of the list except the first one Write a function that uses the a function and a number as its parameters. It is supposed to add the number and one to the function fun do_fun(f,x) = f(x) + x + 1; val a = 2; val a = 2 : int