请教一个正则表达式

<code class="lang-javascript">var string = "sasa<app>sasa<server>sasa<client>ddsdds";
string.match(/\b\w+(?=\>)/g);
</client></server></app></code>

<code class="lang-ruby">string = "sasa<app>sasa<server>sasa<client>ddsdds";
array = string.scan(/\b\w+(?=\>)/);
</client></server></app></code>

<code class="lang-ruby">"sasa<app>sasa<server>sasa<client>ddsdds".scan(/\]*)\>/)
</client></server></app></code>

<code class="lang-perl">my $st="sasa<app>sasa<server>sasa<client>ddsdds";
my @arr;
push @arr, $1 while ($st=~s/]+)>//);

print join(",", @arr);
</client></server></app></code>

<code>$a = 'sasa<app>sasa<server>sasa<client>ddsdds';
@ary = $a =~ //g;
print "@ary";
</client></server></app></code>