Question

我是初学者，如何将它们结合起来：

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：如何将此正则表达式（mystring.replace（/./，“##”）设置为@后将dot更改为##，如何将这两行合并为一个最终阅读是：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1：

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

Answer 2

试试这个......

var mystring = "my.email@computer.com";
document.write(mystring.replace(/(.*@.*)\./, "$1##").replace(/@/, "&&"));

Answer 3

您可以使用split将字符串拆分为/ @ /并将第二个正则表达式应用于字符串的第二部分，然后将结果与＆amp;＆amp;连接起来。

Answer 4

这应该有效：

var mystring = "my.email@computer.com";
document.write(mystring.replace(/(.*?)(@)(.*?)(\.)(.*)/, "$1&&$3##$5"));

结果：

my.email&&computer##com

在此处查看工作：http://jsfiddle.net/gnB85/

Answer 5

试试这个：

var mystring = "my.email@computer.com"
document.write(mystring.replace(/\.(?!\w+@)/, '##').replace(/@/, '&&'));

2个字符串替换javascript

5 个答案: