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Semana 22 - Exercício Checa Parenteses #60

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Semana 22 - Exercício Checa Parenteses #60

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26 changes: 26 additions & 0 deletions semana22/checaParenteses/index.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
function checaParenteses(str) {
const stack = [];

for (let char of str) {
if (char === "(" || char === "[" || char === "{") {
stack.push(char);
} else {
const lastOpeningChar = stack.pop();
if(!lastOpeningChar) {
return false
} else if (
(lastOpeningChar === "(" && char !== ")") ||
(lastOpeningChar === "[" && char !== "]") ||
(lastOpeningChar === "{" && char !== "}")
) {
return false;
}
}
}

if (stack.length > 0) {
return false;
}

return true;
}