valid-parentheses solved

Author: hsskey

valid-parentheses/hsskey.js

@@ -0,0 +1,25 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var isValid = function(s) {
+    const stack = []
+
+    const pair = {
+        ')' : '(',
+        '}' : '{',
+        ']' : '['
+    }
+
+    for (let item of s) {
+        // 여는 괄호
+        if(item === '(' || item === '{' || item === '[') {
+            stack.push(item)
+        // stack길이가 0 or 닫는 괄호 케이스
+        } else if (stack.length === 0 || stack.pop() !== pair[item]) {
+            return false
+        }
+    }
+
+    return stack.length === 0
+};