README
Duplicate Encoder
The goal of this exercise is to convert a string to a new string
where each character in the new string is "(" if that character
appears only once in the original string, or ")" if that character
appears more than once in the original string. Ignore capitalization
when determining if a character is a duplicate.
Examples
“din” => “(((”
“recede” => “()()()”
“Success” => “)())())”
“(( @” => “))((”
Notes
Assertion messages may be unclear about what they display in some
languages. If you read "...It Should encode XXX", the "XXX"
is the expected result, not the input!