javascript - 2 个字符串替换 javascript

Question

我是初学者，我该如何组合它们:

var mystring = "my.email@computer.com";
document.write(mystring.replace(/@/, "&&"));

打印 my.email&&computer.com

var mystring = "my.email@computer.com";
document.write(mystring.replace(/\./, "##"));

打印my##email@computer.com

我有两个问题: 如何在 @ 之后将此正则表达式 (mystring.replace(/./, "##") 更改为 ##以及如何将这两行合并为一行，最终阅读内容为:my.email&&computer##com

Answer 1

输入:my.first.last.email@example.computer.com

结果:my.first.last.email&&example##computer##com

解决方案一:

var mystring = "my.first.last.email@example.computer.com";
//replace '.' after '@' with '##', then replace '@' with '&&'.
var result = mystring.replace(/(?!.*@)\./g, "##").replace(/@/, "&&");
document.write(result);

解决方案 2(可配置):

var mystring = "my.email@computer.com";

var replacements = {
                    '@' : '&&',
                    '.' : '##'
                   };

var str =  "my.first.last.email@example.computer.com";

//match latter part of the string
var result = str.replace(/@\w+(\.\w+)+/g, function(at_and_after) {
    //replace all '.' and '@' in that part.
    return at_and_after.replace(/@|\./g, function(m) { return replacements[m]});
});
document.write(result);  //console.log(result) or alert(result) is a better way for demo