· Jul 28

Code Golf: Parenthesis

Our previous code golf ended with an overwhelming win, so now it's time for another one.
Parenthesis Hell is a Lisp-like esoteric programming language(esolang).
As a Lisp-like language, the code consists only of nested matched pairs of opened and closed parenthesis.
Your task is to write a method that receives a string of parenthesis and returns 1 if the order of the parenthesis is valid. For example, the string of parenthesis (())() is valid because it contains a matched pair of opened and closed parenthesis at each position. The string ()((()))) is not valid because it contains one unmatched parenthesis.







  1. The signature of the contest entry MUST be:

    Class codeGolf.ParenthesisHell
    ClassMethod IsValid(s As %String) As %Boolean
        // Your solution here
  2. It is forbidden to modify class/signature, including but not limited to:
    • Adding inheritance
    • Setting default argument values
    • Adding class elements (Parameters, Methods, Includes, etc).
  3. It is forbidden to refer to non-system code from your entry. For example, this is not a valid entry:

    ClassMethod Build(f As %Integer)
      W ##class(myPackage.myClass).test(a)
  4. The use of $ZWPACK and $ZWBPACK is also discouraged.

  5. You can use this test case:

    Class codeGolf.unittests.ParenthesisHell Extends %UnitTest.TestCase
    Method TestValid()
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("()"), $$$YES)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("(()())"), $$$YES)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("(((())))"), $$$YES)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("()(())((()))(())()"), $$$YES)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("(]{)"), $$$YES)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("(()()(()()(()()()()((()()(()(()((()((()()()((()((()()()((()((((()()(()()()()()()(((()(((()((()((((()(((()()(()()((()((()()()((()()(()()()()(()()()()(()()()()(()(())))))))))))))))))))))))))))))))))))))))))))))))))"), $$$YES)
    Method TestInValid()
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("(]"), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("()(()(()))(()()"), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid(")("), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("()()("), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("((())"), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("())(()"), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid(")()"), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid(")"), $$$NO)
        Do $$$AssertEquals(##class(codeGolf.ParenthesisHell).IsValid("(()()(()()(()()()()((()()(()(()((()((()()()((()((()()()((()((((()()(()()()()()()(((()(((()((()((((()(((()()(()()((()((()()()((()()(()()()()(()()()()(()()()()(()(()))))))))))))))))))))))))))))))))))))))))))))))))"), $$$NO)
Discussion (37)3
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 ClassMethod IsValid(As %String) As %Boolean
    // Floats around them no good characters
    // Erupts Combination jabs "(" followed by ")"
    // Relentless follow up until stringy looks unbalanced
    {q:s'[("()") s=$Replace(s,"()","")}
    // Swings for the knock out

OK, I start with 47 chars... unfortunately, I have to add 20 chars more for that (stupid) extra requirement of ignoring characters like {, [, <, etc. therefore end up with 67 chars

ClassMethod IsHalfValid(x)
1	s z=x,x=$replace(x,"()","") g 1:x'=z q x=""

ClassMethod IsFullValid(x)
1	s z=x,x=$replace($zstrip(x,"*e",,"()"),"()","") g 1:x'=z q x=""

Speed was'n asked...

Thanks for the comment. I tested only on the provided data. The second option requires improvement.

size = 72
size = 69