我试图用多个其他单词替换字符串中的多个单词。字符串是“我有一只猫,一只狗和一只山羊。”

然而,这并不会产生“我有一只狗、一只山羊和一只猫”,而是产生“我有一只猫、一只猫和一只猫”。是否有可能在JavaScript中同时用多个其他字符串替换多个字符串,以便产生正确的结果?

var str = "I have a cat, a dog, and a goat.";
str = str.replace(/cat/gi, "dog");
str = str.replace(/dog/gi, "goat");
str = str.replace(/goat/gi, "cat");

//this produces "I have a cat, a cat, and a cat"
//but I wanted to produce the string "I have a dog, a goat, and a cat".

当前回答

通过使用原型函数,我们可以通过传递对象的键和值以及可替换的文本轻松地进行替换

String.prototype.replaceAll =函数(obj keydata =“关键”){ const键= keydata.split(关键); 返回Object.entries (obj) .reduce((,(关键,val)) = > a.replace(“${键[0]}${关键}${键[1]}',val),) } Const data=' hidden dv SDC sd ${yathin} ${ok}' console.log (data.replaceAll ({yathin: 12,好的:“嗨”},“${关键}”))

其他回答

我修改了本·麦考密克的答案以配合你的新测试用例。 我只是在正则表达式中添加了单词边界:

/\b(cathy|cat|catch)\b/gi

“运行代码片段”可以看到下面的结果:

var str = "我有一只猫,一个catch,和一个cathy."; var mapObj = { 凯茜:“猫”, 猫:“抓”, 抓住:“凯蒂” }; STR = STR .replace(/\b(cathy|cat|catch)\b/gi, function(matched){ 返回mapObj(匹配); }); console.log (str);

    var str = "I have a cat, a dog, and a goat.";

    str = str.replace(/goat/i, "cat");
    // now str = "I have a cat, a dog, and a cat."

    str = str.replace(/dog/i, "goat");
    // now str = "I have a cat, a goat, and a cat."

    str = str.replace(/cat/i, "dog");
    // now str = "I have a dog, a goat, and a cat."

以防有人想知道为什么原来海报上的解决方案不管用:

var str = "I have a cat, a dog, and a goat.";

str = str.replace(/cat/gi, "dog");
// now str = "I have a dog, a dog, and a goat."

str = str.replace(/dog/gi, "goat");
// now str = "I have a goat, a goat, and a goat."

str = str.replace(/goat/gi, "cat");
// now str = "I have a cat, a cat, and a cat."

这招对我很管用:

String.prototype.replaceAll = function(search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, 'g'), replacement);
};

function replaceAll(str, map){
    for(key in map){
        str = str.replaceAll(key, map[key]);
    }
    return str;
}

//testing...
var str = "bat, ball, cat";
var map = {
    'bat' : 'foo',
    'ball' : 'boo',
    'cat' : 'bar'
};
var new = replaceAll(str, map);
//result: "foo, boo, bar"

为此,您可以使用https://www.npmjs.com/package/union-replacer。它基本上是一个字符串。Replace (regexp,…)对等体,它允许在一次传递中发生多次替换,同时保留string.replace(…)的全部功能。

披露:我是作者。开发这个库是为了支持更复杂的用户可配置替换,它解决了所有有问题的事情,比如捕获组、反向引用和回调函数替换。

上面的解决方案对于精确的字符串替换来说已经足够好了。