文字列マッチング問題

3725 ワード

javascript

問題の説明:Ginven a string containing just the characters'('、')'''、''''''''、''''and'''で、determine if the input string is valid.
The braackets must close in the corectorder,"()""are all valid but"(")"(")""are"(")""are"([]]]]are not.文字列を指定します.文字列は、文字("、"""""""""、"""")、",",",",","",",",",",",",",",",",",",",",",",",",",",",",",",",",",",",","すべて有効ですが、「()」と「()」は違います.


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

var isValid = function isValid(s) {
    debugger
    var valid = true,
    pair = {
        '(': ')',
        '[': ']',
        '{': '}'
    },
    nowWaitingFor = [];

    for (var i = 0; i < s.length; i++) {
        var nowChar = s.charAt(i);


        if (nowChar.match(/[(\[\{]/)) {

            nowWaitingFor.unshift(pair[nowChar]);

        } 
        else if (nowChar.match(/[)\]\}]/)) {

            if (nowWaitingFor[0] !== nowChar) {
                valid = false;
                break;
            } else {
                nowWaitingFor.splice(0, 1);
            }
        }
    }

    if (nowWaitingFor.length !== 0) {
         valid = false;
    }

    return valid;
};
console.log(isValid("()})"))
script>
body>
html>

19のJavaScriptの便利な略字の書き方を共有します.