关于javascript：是否有更简洁的方法来设置条件语句来执行变量的任意值集？


Is there a more concise way to set up a conditional statement to execute for an arbitrary set of values of a variable?

本问题已经有最佳答案，请猛点这里访问。

is there /简洁/更高效的方式：eloquent to write thisP＞＜／

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else if ((aInd === 3)||(aInd === 7)||(aInd === 9)||(aInd === 19)
     letter = alphabet[aInd + 1].toUpperCase();

is that there any valid北样表P＞＜／

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if (a === (3 || 7 || 13 || 19) {do this}

……或让你组sets of values of for a在单变量的方式更简明比布尔表达式与|帮of |逻辑？P＞＜／

背景：新手程序员工作的挑战，通过在线coderbyte Cypher在Basic that……以一定的动作(capitalizing if the letter is a vowel)。为简单的原因(因为这是used of the program在elsewhere)阵列declared安字母A-Z字母含each in the form of a字符串。茶是每一个transposes Cypher also to the right，the alphabet of the letters to成为vowels指数是3，7，13，19)。aind represents the index of letter in the alphabet。P＞＜／

全码：P＞＜／

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function letterChanges(str) {
    var alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
    var words = str.toLowerCase().split(' '), senArray = words.map(function(word) {return word.split('')});
    senArray.forEach(function(word) {
        word = word.filter(function(letter, index, word) {
            if ((Boolean(alphabet.indexOf(letter))) === false) return false;
            else return true;
        });
    });

    senArray[0].map(function(letter) {
        var aInd = alphabet.indexOf(letter);
        switch (aInd) {
            case 25:
                letter = alphabet[aInd].toUpperCase();
                break;
            case (3 || 7 || 13 || 19):
                letter  = alphabet[aInd + 1].toUpperCase();
                console.log(letter);
                break;
            default:
                letter  = alphabet[aInd + 1];
                break;
        }
        return letter;
    })
   
    return senArray.map(function(word) {
        return word.map(function(letter) {
        var aInd = alphabet.indexOf(letter);
        if (aInd === 25) {letter = alphabet[aInd].toUpperCase();}
        else if ((aInd === 3)||(aInd === 7)||(aInd === 13)||(aInd === 19)) {letter  = alphabet[aInd + 1].toUpperCase();}
        else {letter  = alphabet[aInd + 1];}
        return letter;
    }).join('');
    }).join(' ');
}

letterChanges("Input string goes here.");

P＞＜／

相关讨论

将值作为数组传递，并检查indexOf。

在你的情况下，

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if ([3, 7, 13, 19].indexOf(aInd) > -1) {
  letter  = alphabet[aInd + 1].toUpperCase();
}
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