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eugeneglova/index.js

Last active August 29, 2015 14:10
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Check for correct brackets in string
Raw
index.js
function check(s) {
var i = 0, l;
s = s.replace(/[^\{\}\(\)\[\]]/g, "");
l = s.length;
if ( ! l) return true;
if (l % 2 !== 0) return false;
while (s.length && i < l) {
s = s.replace(/\{\}|\(\)|\[\]/g, "");
i++;
}
return !s.length;
}
console.assert(check("a( b)") === true);
console.assert(check("[{}]") === true);
console.assert(check("[(]") === false);
console.assert(check("}{") === false);
console.assert(check("z([{}-()]{a})") === true);
console.assert(check("") === true);
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