Javascript regex multiple captures again
Question
Ok, I think I need to repost my question that was originally:
Javascript Regex group multiple
with a full example. I have:
var text = ""+
"<html> " +
" <head> " +
" </head> " +
" <body> " +
" <g:alert content='alert'/> " +
" <g:alert content='poop'/> " +
" </body> " +
"</html>";
var regex = /<([a-zA-Z]*?):([a-zA-Z]*?)\s([\s\S]*?)>/m;
var match = regex.exec( text );
console.log(match)
Output from console.log is:
The problem is that I am only getting the result for the first ... not the other... what can I do to be able to capture and walk over all stuff that matched?
2 answers
solution1
14 ACCPTED 2013-02-05 12:25:09
exec returns only ONE result at a time and sets the pointer to the end of that match. Therefore, if you want to get ALL matches use a while loop:
while ((match = regex.exec( text )) != null)
{
console.log(match);
}
To get all matches at one shot, use text.match(regex) , in which the regex has g (global flag) specified. The g flag will make match find all matches to the regex in the string and return all the matches in an array.
[edit] and that's why my example HAD ag flag set! [/eoe]
var text = ""+
"<html> " +
" <head> " +
" </head> " +
" <body> " +
" <g:alert content='alert'/> " +
" <g:alert content='poop'/> " +
" </body> " +
"</html>";
// Note the g flag
var regex = /<([a-zA-Z]*?):([a-zA-Z]*?)\s([\s\S]*?)>/gm;
var match = text.match( regex );
console.log(match);
SIMPLE TEST:
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var text = ""+
"<html> " +
" <head> " +
" </head> " +
" <body> " +
" <g:alert content='alert'/> " +
" <g:alert content='poop'/> " +
" </body> " +
"</html>";
// Note the g flag
var regex = /<([a-zA-Z]*?):([a-zA-Z]*?)\s([\s\S]*?)>/gi;
var n = text.match( regex );
alert(n);
}
</script>
working perfectly...
solution2
2 2013-02-05 13:06:02
This is what works:
var text = ""+
"<html> " +
" <head> " +
" </head> " +
" <body> " +
" <g:alert content='alert'/> " +
" <g:alert content='poop'/> " +
" </body> " +
"</html>";
var regex = /<([a-zA-Z]*?):([a-zA-Z]*?)\s([\s\S]*?)>/g;
var match = null;
while ( (match = regex.exec( text )) != null )
console.log(match)
Notice the /g which seems to be neccessary
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