2 strings replace javascript

Question

I am a beginner, how do I combine them:

var mystring = "[email protected]";
document.write(mystring.replace(/@/, "&&"));

prints my.email&&computer.com

var mystring = "[email protected]";
document.write(mystring.replace(/\./, "##"));

prints my##[email protected]

I have two questions: How do I make this regex (mystring.replace(/./, "##") to after @ change the dot to ## and how can I combine those two lines into one, and final read is:my.email&&computer##com

hold on, you expect result is my.email&&computer##com instead of my##email&&computer##com ? — Rain Diao
– Rain Diao, Commented Feb 7, 2013 at 3:57

Rain Diao · Accepted Answer · 2013-02-07 04:33:28Z

4

input : [email protected]

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

Solution 1:

var mystring = "[email protected]";
//replace '.' after '@' with '##', then replace '@' with '&&'.
var result = mystring.replace(/(?!.*@)\./g, "##").replace(/@/, "&&");
document.write(result);

Solution 2 (configurable):

var mystring = "[email protected]";

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

var str =  "[email protected]";

//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

edited Feb 7, 2013 at 4:33

answered Feb 7, 2013 at 3:53

Rain Diao

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8 Comments

olo Over a year ago

thanks but it prints my##email&&computer.com, I'd like it to print my.email&&computer##com

olo Over a year ago

thanks again, Uncaught SyntaxError: Unexpected token ; on line 15

olo Over a year ago

Many thanks @Rain Diao, it prints my##email&&computer##com, I guess the regex needs to be like, do nothing before @, after @ then replace .

Talha Akbar Over a year ago

he used /g , it means all . will be replaced with ##

olo Over a year ago

yes, but remove /g, it doesnt replace the last ., just needed to replace the last .

|

ATOzTOA · Accepted Answer · 2013-02-07 04:12:25Z

2

Try this...

var mystring = "[email protected]";
document.write(mystring.replace(/(.*@.*)\./, "$1##").replace(/@/, "&&"));

edited Feb 7, 2013 at 4:12

answered Feb 7, 2013 at 3:55

ATOzTOA

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2 Comments

ATOzTOA Over a year ago

Updated answer to skip replacing dot before @.

ATOzTOA Over a year ago

@olo Remember, this only replaces a single occurrence of @ and dot.

Michael Day · Accepted Answer · 2013-02-07 03:52:58Z

1

You could use split to split the string at /@/ and apply the second regexp to the second part of the string, then join the results back together with &&.

answered Feb 7, 2013 at 3:52

Michael Day

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Comments

leoinfo · Accepted Answer · 2013-02-07 04:35:48Z

1

This should work:

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

Result:

my.email&&computer##com

See it here working: http://jsfiddle.net/gnB85/

edited Feb 7, 2013 at 4:35

answered Feb 7, 2013 at 4:10

leoinfo

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1 Comment

leoinfo Over a year ago

@olo - I didn't noticed that you wanted to replace the "@" by two "&" ... It's fixed now. You get "&&" instead of "@" in a single regex replace

rbernabe · Accepted Answer · 2013-02-07 04:03:19Z

0

Try this:

var mystring = "[email protected]"
document.write(mystring.replace(/\.(?!\w+@)/, '##').replace(/@/, '&&'));

answered Feb 7, 2013 at 4:03

rbernabe

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