This is a FAQ. Please research using perldoc -q and use super search before asking a question...

my %hash;
$hash{$_}=1 foreach @array_1;
@array_2=grep($hash{$_},@array_2);
[download]

When you do read the FAQ's you will find a number of variants of the above along with suggestions about how to do this with various constraints.

Also, perl is not restricted to C's overworked and confusing for() syntax. Your for loops above would be much simpler (and would involve less typing, and be less susceptable to fence pst errors) if done as follows

#for (my $search =0; $search<scalar @array1; $search++) # blech, this 
+isnt C you know
for my $search (0.. $#array1)                           # ahhh thats m
+uch better
[download]

HTH

Sorry to repeat other peoples responses, I failed to press "submit" and then went on to other things.... :-)

--- demerphq
my friends call me, usually because I'm late....

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.