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[yuhyeon99] WEEK 06 solutions #2183

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[yuhyeon99] WEEK 06 solutions #2183

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38 changes: 38 additions & 0 deletions valid-parentheses/yuhyeon99.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
/**
* @param {string} s
* @return {boolean}
*/
var isValid = function(s) {
var stack = [];

var openDic = {
'{': '}',
'[': ']',
'(': ')'
};
var closeDic = {
'}': '{',
']': '[',
')': '('
};

for(let e of [...s]) {
if(!stack.length) {
stack.push(e);
continue;
};

const lastEle = stack.pop();

if(closeDic[e]) {
if(!openDic[lastEle]) return false;
if(openDic[lastEle] !== e) return false;
continue;
} else {
stack.push(lastEle);
stack.push(e);
}
}

return stack.length === 0;
};