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Validating brackets in a string in JavaScript
We are required to write a JavaScript function that takes in a string that might contain some opening and closing brackets. The function should whether for all the opening brackets there exists a closing bracket or not. If the brackets are rightly matched, the function should return true, false otherwise.
For example −
f('(hello (world))') = true
f('(hello (world)') = falseExample
Following is the code −
const str1 = '(hello (world))';
const str2 = '(hello (world)';
const validateBrackets = (str = '') => {
const strArr = str.split('');
let counter = 0;
for (let i = 0, len = strArr.length; i < len; i++) {
if (strArr[i] === "(") {
counter++;
}else if (strArr[i] === ")") {
counter--;
};
if (counter < 0) {
return false;
};
};
if (counter === 0) {
return true;
};
return false;
};
console.log(validateBrackets(str1));
console.log(validateBrackets(str2));Output
Following is the output on console −
true false
Updated on: 11-Dec-2020
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