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
我写了这个npm包stringinject https://www.npmjs.com/package/stringinject，它允许你做以下事情
var string = stringInject("this is a {0} string for {1}", ["test", "stringInject"]);
这将替换{0}和{1}与数组项，并返回以下字符串
"this is a test string for stringInject"
或者你可以像这样用对象键和值替换占位符:
var str = stringInject("My username is {username} on {platform}", { username: "tjcafferkey", platform: "GitHub" });
"My username is tjcafferkey on Github"
其他回答
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}”))
我写了这个npm包stringinject https://www.npmjs.com/package/stringinject，它允许你做以下事情
var string = stringInject("this is a {0} string for {1}", ["test", "stringInject"]);
这将替换{0}和{1}与数组项，并返回以下字符串
"this is a test string for stringInject"
或者你可以像这样用对象键和值替换占位符:
var str = stringInject("My username is {username} on {platform}", { username: "tjcafferkey", platform: "GitHub" });
"My username is tjcafferkey on Github"
<!DOCTYPE html>
<html>
<body>
<p id="demo">Mr Blue
has a blue house and a blue car.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var str = document.getElementById("demo").innerHTML;
var res = str.replace(/\n| |car/gi, function myFunction(x){
if(x=='\n'){return x='<br>';}
if(x==' '){return x=' ';}
if(x=='car'){return x='BMW'}
else{return x;}//must need
});
document.getElementById("demo").innerHTML = res;
}
</script>
</body>
</html>
一种可能的解决方案是使用mapper表达式函数。
const regex = /(?:cat|dog|goat)/gmi;
const str = `I have a cat, a dog, and a goat.`;
let mapper = (key) => {
switch (key) {
case "cat":
return "dog"
case "dog":
return "goat";
case "goat":
return "cat"
}
}
let result = str.replace(regex, mapper);
console.log('Substitution result: ', result);
//Substitution result1: I have a dog, a goat, and a cat.
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);
