Hello PatGro, and welcome to the Monastery!

I'll read more on closure later today

• Start with the FAQ: What's a closure?.
• If you have access to the Camel Book¹, you can read about closures in Chapter 8: References.
• The Monastery has a tutorial: Closure on Closures.
• For in-depth study, Higher-Order Perl (2005) by Mark Jason Dominus is hard to beat. The opening chapters show how closures work-in naturally with other features of Perl to facilitate elegant solutions to common programming problems. The book is available free online at http://hop.perl.plover.com/.

¹Tom Christiansen, brian d foy & Larry Wall with Jon Orwant, Programming Perl, 4^th Edition, 2012.

Hope that helps,

Update: Added author links.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.