Valid parens
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function validParentheses(parens){
// console.log(parens);
const stack = [];
const parensArray = parens.split('');
parensArray.shift();
if (parens.length === 1) {
return false;
}
stack.push(parens[0]);
parensArray.forEach((paren, index) => {
if (stack[stack.length - 1] === '(' && paren === ')') {
stack.pop();
} else {
stack.push(paren);
}
});
return !Boolean(stack.length);
}
console.log(validParentheses(''));
JavaScript
INFO