Exercício do Dia - Checa Parênteses Válidos

logic-exercises/exercise-day-3/checkParenthesis.js

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+function checkParenthesis(str) {
+    var stack = [];
+    for (var _i = 0, str_1 = str; _i < str_1.length; _i++) {
+        var char = str_1[_i];
+        if (char === "(" || char === "[" || char === "{") {
+            stack.push(char);
+        }
+        else {
+            var 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;
+}
+console.log(checkParenthesis("()"));
+console.log(checkParenthesis("(]"));
+console.log(checkParenthesis("({})"));
+console.log(checkParenthesis("([})"));

logic-exercises/exercise-day-3/checkParenthesis.ts

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+function checkParenthesis(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
+}
+
+console.log(checkParenthesis("()"))
+console.log(checkParenthesis("(]"))
+console.log(checkParenthesis("({})"))
+console.log(checkParenthesis("([})"))

logic-exercises/exercise-day-3/package.json

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+{
+  "name": "exercise-day-3",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start":"clear && tsc --outFile checkParenthesis.js checkParenthesis.ts && node checkParenthesis.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}