Mistake in test case Question #230

There is a mistake in this question.

It is written that "{dklf(df(kl))d]{}" is a valid test case while it is not due to the not opened "[".

Please update the question.

The code I used to test the cases:

const sum = (arr: number[]): number => arr.reduce((acc, el) => acc+el, 0);

type OpeningBracket = "(" | "[" | "{";
type BracketStackMap = Record<OpeningBracket, number>;

const checkBrackets = (str: string) => {
  const brackets = ["(",")", "[","]", "{","}"]; // "()[]{}".split("");
  
  const filtered = str.split("").filter(character => brackets.includes(character));
  const bracketsStack = new Map<BracketStackMap>([["(", 0], ["[", 0], ["{", 0]]);

  for(let i=0; i<filtered.length; i++){
    // could be simplified with closed/opening bracket key/value mapping
    const key = filtered[i] === ")" ? "("
          : filtered[i] === "]" ? "["
          : filtered[i] === "}" ? "{"
          : filtered[i];
    
    const currentVal = bracketsStack.get(key);
    
    // console.log({i, str: filtered[i], key})
    
    switch(filtered[i]){
      case "(":
      case "[":
      case "{":
        bracketsStack.set(filtered[i], currentVal + 1);
        break;
      case ")":
      case "]":
      case "}":
        bracketsStack.set(key, currentVal - 1);
        break;
      default: throw new Error(`Unhandled bracket: ${filtered[i]}`);
    }
    
    if(bracketsStack.get(key) < 0){
      // console.log("negative", bracketsStack.get(key))
      return false;
    };
  }
  
  return (sum([...bracketsStack.values()]) === 0);
};

const tests = {
  "{ac[bb]}": true, 
  "{dklf(df(kl))d]{}": true, //fails, should pass according to task description
  "{[[[]]]}": true,
  "{3234[fd": false,
  "{df][d}": false
};

Object.entries(tests).forEach(([test, expected]) => {
  const result = (checkBrackets(test) === expected) ? "✅" : "❌";
  
  console.log(`${result} "${test}" `);
});

// results
"✅ '{ac[bb]}' "
"❌ '{dklf(df(kl))d]{}' "
"✅ '{[[[]]]}' "
"✅ '{3234[fd' "
"✅ '{df][d}' "

Open question 230 from the linked DevFAQ page and compare the stated valid test case with the issue’s bracket analysis and TypeScript reproduction. Update the question so the example with the unmatched closing bracket is represented correctly, then verify that the displayed test cases and expected results are consistent.