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    <p>Because the <code>+</code> tells it to repeat the exact stuff inside brackets <code>(?:"(.+?)",?)</code> one or more times. So it will match the <code>"eee"</code> string, end then look for repetitions of that <code>"eee"</code> string, which it does not find. </p> <pre><code>use YAPE::Regex::Explain; print YAPE::Regex::Explain-&gt;new(qr/var strings = \[(?:"(.+?)",?)+/)-&gt;explain(); The regular expression: (?-imsx:var strings = \[(?:"(.+?)",?)+) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- var strings = 'var strings = ' ---------------------------------------------------------------------- \[ '[' ---------------------------------------------------------------------- (?: group, but do not capture (1 or more times (matching the most amount possible)): ---------------------------------------------------------------------- " '"' ---------------------------------------------------------------------- ( group and capture to \1: ---------------------------------------------------------------------- .+? any character except \n (1 or more times (matching the least amount possible)) ---------------------------------------------------------------------- ) end of \1 ---------------------------------------------------------------------- " '"' ---------------------------------------------------------------------- ,? ',' (optional (matching the most amount possible)) ---------------------------------------------------------------------- )+ end of grouping ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- </code></pre> <p>A simpler example would be:</p> <pre><code>my @m = ('abcd' =~ m/(\w)+/g); print "@m"; </code></pre> <p>Prints only <code>d</code>. This is due to:</p> <pre><code>use YAPE::Regex::Explain; print YAPE::Regex::Explain-&gt;new(qr/(\w)+/)-&gt;explain(); The regular expression: (?-imsx:(\w)+) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?-imsx: group, but do not capture (case-sensitive) (with ^ and $ matching normally) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- ( group and capture to \1 (1 or more times (matching the most amount possible)): ---------------------------------------------------------------------- \w word characters (a-z, A-Z, 0-9, _) ---------------------------------------------------------------------- )+ end of \1 (NOTE: because you are using a quantifier on this capture, only the LAST repetition of the captured pattern will be stored in \1) ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- </code></pre> <p>If you use the quantifier on the capture group, only the last instance will be used.</p> <hr> <p>Here's a way that works:</p> <pre><code>my $str = &lt;&lt;STR; ... ... var strings = ["aaa","bbb","ccc","ddd","eee"]; ... ... STR my @matches; $str =~ m/var strings = \[(.+?)\]/; # get the array first my $jsarray = $1; @matches = $array =~ m/"(.+?)"/g; # and get the strings from that print "@matches"; </code></pre> <hr> <p><strong>Update</strong>: A single-line solution (though not a single regex) would be:</p> <pre><code>@matches = ($str =~ m/var strings = \[(.+?)\]/)[0] =~ m/"(.+?)"/g; </code></pre> <p>But this is highly unreadable imho.</p>
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    1. COYeah, thats cool. Thanks. But is there any way it can be done in a single regex.
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    2. CO@Jithin for what reason you want single regex? it's hard to read and besides all small regexes work faster that single
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    3. CO@simbabque In the simple example you given, it matches only, _d_ because of the greediness. Changing your expression to `m/(\w)+?/g` will matches all, ie `a b c d`. But why it not worked for group regex in Question Update 2?
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