Replace the string that begins with a given characters

Question

I am trying to find a way to replace some special strings with their relative smileys.

for example replace \ue40a with <img src="image/path"/> and replace \ue53c with <img src="image/path/2"/>

How can I find , in a given text , each string that begins with \ue and get the three next characters and then replace them by an img tag ?

Thank you for your help !

Is there any JavaScript you've written to try to solve this? — PeterKA, Nov 28 '14 at 16:53
the regex is fairly simple but how do you know to map `40a` to `/path` and `53c` with `/path/2`? — Rhumborl, Nov 28 '14 at 16:53
Since we do not know which language or server architecture you use, my only recommendation are [regular expressions](http://en.wikipedia.org/wiki/Regular_expression) or simply the search and replace function of your favourite text editor. You need to supply more information to get a detailes answer. — Matthias Hauert, Nov 28 '14 at 16:55
@Rhumborl I have an array that contains each string key associated to a path value — R4mirezZ, Nov 28 '14 at 16:56
Replace the string `\ue40a` (ie `x = "aa \\ue40a bb"` ) or the character `\ue40a` ? — Alex K., Nov 28 '14 at 16:57
What if those characters are inside a html tag? Then you probably don't want to replace, so you must parse html in order to know whether you should replace or not. But [you can't parse html with regex](http://stackoverflow.com/a/1732454/1529630). — Oriol, Nov 28 '14 at 16:58
@Rhumborl But it may still be a good idea to handle this on the server side... — Matthias Hauert, Nov 28 '14 at 17:16

score 2 · Accepted Answer · answered Nov 28 '14 at 17:10

2

Use replace and a match function:

input = input.replace(/(\\u[a-f0-9]{4})/gi, function(m) {
    switch (m.toUpperCase())
    {
        case "\\UE40A": return '<img src="image/path"/>';
        case "\\UE53C": return '<img src="image/path/2"/>';
        default: return m;
    }
});

answered Nov 28 '14 at 17:10

Alex K.

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Try it with `input = '
'`. – Oriol Nov 28 '14 at 17:17
If you alert() your *real* input string and actually *see* "\ue40a" then to replicate that string in javascript you need to use two \\ instead of one \ - http://jsfiddle.net/ztj0akp6/ – Alex K. Nov 28 '14 at 17:31

Replace the string that begins with a given characters

1 Answers1