JavaScript/strings_validation-parentesies.html at master · chosenman/JavaScript · GitHub

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<!DOCTYPE html>
<html>
<head>
	<title></title>
	<meta charset="utf-8">
	<script type="text/javascript">

		function parseValid(str) {
			var count=0;
			var bull = true;

			for(var i=0; i<str.length; i++) {
				if(str[i] == "("){
					count++;
				} else if(str[i] == ")") {
					count--;
				}
				if (count== -1){
					bull =false;
					break;
				}
			};
			if(count != 0){
				bull = false;
			}
			return bull;
		}

		 console.log(parseValid("()(sdfsdf)((nn)"));


		function parseValArray(string){
			var LP = [];
			var RP = [];
			for ( i=0; i<string.length; i++ ){
				if(string[i] == "(") {
					LP.push(i);
				} else if ( string[i] == ")" ) {
					RP.push(i);
				}
			}
			console.log(LP);
			console.log(RP);
			if(LP.length == RP.length) {
				for ( var i = 0; i < LP.length; i++ ) {
						if( LP[i] < RP[i] ) {
							continue;
						} else {
							return false;
						}
				}
				return true;
			} else {
				return false;
			}
		}

		console.log( parseValArray('(h()) )') );


	</script>
</head>
<body>

</body>
</html>