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

使用正则函数定义要替换的模式,然后使用replace函数处理输入字符串,

var i = new RegExp('"{','g'),
    j = new RegExp('}"','g'),
    k = data.replace(i,'{').replace(j,'}');

其他回答

我们也可以使用split()和join()方法:

var str = "我有一只猫,一只狗,和一只山羊。"; str = str.split(“猫”)。映射(x =>{返回x.split("dog"))。地图(y = >{返回y.split(“山羊”). join(“猫”);}). join(“山羊”);}). join(“狗”); console.log (str);

const str = '感谢为Stack Overflow贡献一个答案!' Const substr = ['for', 'to'] 函数boldString(str, substr) { 让boldStr boldStr = str 字符串的子串。映射(e => { const strRegExp = new RegExp(e, 'g'); boldStr = boldStr。替换(strRegExp ' <强> $ {e} < / >强'); } ) 返回boldStr }

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}”))

使用正则函数定义要替换的模式,然后使用replace函数处理输入字符串,

var i = new RegExp('"{','g'),
    j = new RegExp('}"','g'),
    k = data.replace(i,'{').replace(j,'}');

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."