Perl foreach seems to have its own scope created for each loop and then the closure snaps the current scope. The following, code without the foreach code does 444,

my $i;
$i = 0;
push(@flist, sub {$i * $_[0]});
$i = 1;
push(@flist, sub {$i * $_[0]});
$i = 2;
push(@flist, sub {$i * $_[0]});
[download]

Python must behave this way, no per loop scope. But it let me ask myself (and the monks in fact) why the following code does 024?

my $i;
foreach $i (0 .. 2) {
  push(@flist, sub {$i * $_[0]});
}
[download]

Does not my define the scope and then putting it before the loop should not make it apply on the loop? Note: lisp can behave both ways, and maybe even more, one may not compare lisp with javascript:)

---

---

• 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.