How to replace characters in a string with other characters?

Question

I want to replace certain characters in a string with other characters. I´ve did my research and found that the best way is to use regular expressions... But, something doesn´t work ... Here´s what i did so far...

var alphabet = {
   'á':'a',
   'é':'e',
   'í':'i'
};

var word = $("input[name=phrase]").val();
alert(word);  //output: ok!

var url = word.replace(/áéí|/g, function(s) {
    return alphabet[s];
});

alert(url); //output: undefined,undefined,undefined...

Is the pipe a typo or really part of your code?

Ray Toal
– Ray Toal

2011-09-21 23:53:52 +00:00
Commented Sep 21, 2011 at 23:53 — Ray Toal
– Ray Toal, Commented Sep 21, 2011 at 23:53
Thought so, just making sure. :)

Ray Toal
– Ray Toal

2011-09-22 04:56:03 +00:00
Commented Sep 22, 2011 at 4:56 — Ray Toal
– Ray Toal, Commented Sep 22, 2011 at 4:56

Community · Accepted Answer · 2017-05-23 09:59:35Z

5

Match any of those characters using [], ~~and capture the match(es) using ()~~ instead of looking for a match of those consecutive characters.

var url = word.replace(/[áéí]/g, function(s) {
    return alphabet[s];
});

DEMO: http://jsfiddle.net/5UmLV/1/

As noted by @Felix Kling the capture group was unnecessary. Updated to reflect that improvement.

edited May 23, 2017 at 9:59

CommunityBot

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answered Sep 21, 2011 at 23:54

user113716

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5 Comments

Felix Kling Over a year ago

Is a capture group really necessary? Anyways, +1.

Ray Toal Over a year ago

No, not necessary. word.replace(/[áéí]/g, function(s) {return alphabet[s];}) works fine.

Marco Over a year ago

thanks... that idea works. What if there is more then 1 character to be replace. like '...' : '' how does it go in the regular expressions? i tried using quotes, like '...' but then it confuses the actual quote with a replacement character '\'' : ''

user113716 Over a year ago

@Marco: Then get rid of the [] , and use | to separate the possibilities: /á|é|í|\.\.\./g jsfiddle.net/5UmLV/4

Felix Kling Over a year ago

@Marco: Are you sure these are three dots? Maybe you have an ellipsis, which is one character. Just saying that not everything that looks like multiple characters consists of multiple characters ;)

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