regexp like preg_match

[GGGO]

I'm trying to understand package regexp, but I can't find a solution
to get data in a text like preg_match does in PHP.

preg_match('/^website: (.*) value="(.*)"/imU','website: sample.com
value="100"', $result)
$result[1] get the first (.*) => sample.com
$result[2] get the second (.*) => 100

Can I do the same thing with regexp ?

Thank you.

[GGGO]

Ok I got it !
Hope it could help someone else.

r := regexp.MustCompile(`^website: (.*) value="(.*)"$`)
result := r.FindAllStringSubmatch(`website: www.sample.com
value="100"`,1)
fmt.Printf("Result1: %s\n",result[0][1]) // www.sample.com
fmt.Printf("Result2: %s\n",result[0][2]) // 100

FindAllStringSubmatch detects ( ) and return value of parenthesis

Comments are welcome.

[Matthew R Chase]

I've been having trouble with FindAllStringSubmatch.

Given a text string like:

_______________________________

word = some value

word = some other value

word = some|delimited|list
________________________________

I tried:

____________________________________________________

assigned := regexp.MustCompile(`^(\s*)(\w+?)(\s*)=(\s*)(.+?)$`)

matched := assigned.FindAllStringSubmatch(string(body), -1)

fmt.Println(string(body))

fmt.Println("Length of matched:", len(matched))

for i, v := range matched{

fmt.Println(i)

fmt.Println(v)

}

____________________________________________________

but would not find any matches.  if I changed my regex to `^(\s*)(\w+?)(\s*)=(\s*)(.+?)[\r\n]+`

it would find only one match.  I therefore do not understand the "All" part of "FindAllStringSubmatch"

I also don't understand why I had to use [\r\n]+ instead of $, but that's not as important.

thanks for your insight!

[DisposaBoy]

You're telling it to match at the start and end with ^ and $, if you want them to bound to the line then you need to tell it that e.g MustCompile(`(?m)^(\s*)... see http://code.google.com/p/re2/wiki/Syntax  

[Matthew R Chase]

I found it was problem with terminator.  and you're right -- multi-line mode was the answer.

Thanks!

Revised examples:

__________________________________________________________________

//Method 1: split for lines.

assigned := regexp.MustCompile(`^(?:\s*)(\w+?)(?:\s*)=(?:\s*)(.+?)$`)

lines := strings.Split(body, "\n")  //assumes no \r

for i,v := range lines{

fmt.Println("body[" + strconv.Itoa(i) + "] is:", v)

matched := assigned.FindStringSubmatch(v)

if(len(matched) == 3){

fmt.Println("  - " + matched[1] + ":" + matched[2])

}

}

//Method 2 (more better): multi-line Regex mode.

assigned = regexp.MustCompile(`(?m)^(?:\s*)(\w+?)(?:\s*)=(?:\s*)(.+?)$`)

matched  := assigned.FindAllStringSubmatch(body, -1)

fmt.Println("Length of matched:", len(matched))

for i, v := range matched{

fmt.Println("line[" + strconv.Itoa(i) + "] matched: ", v[1], ":", v[2])

}

__________________________________________________________________