Re^3: Newbie: parentheses, map, etc.

The documentation lies. On failure, it returns the canonical false value, which is an empty string in string context and 0 in numeric context.

--
Online Fortune Cookie Search

Comment on Re^3: Newbie: parentheses, map, etc.

Replies are listed 'Best First'.
Re^4: Newbie: parentheses, map, etc. by kyle (Abbot) on Mar 04, 2008 at 15:59 UTC
Upon first reading this, I thought, "what's the difference?" More to the point, "how does one behave differently from the other?" After all, an empty string in a numeric context is zero anyway. How would one ever see the difference? Some time later, the answer popped into my head. A string turned number will trigger warnings, but `s///` won't. I verified this in the Test::More fashion. Read more... (1008 Bytes) Thanks for the food for thought.	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^4: Newbie: parentheses, map, etc.
by kyle (Abbot) on Mar 04, 2008 at 15:59 UTC

Upon first reading this, I thought, "what's the difference?" More to the point, "how does one behave differently from the other?" After all, an empty string in a numeric context is zero anyway. How would one ever see the difference?

Some time later, the answer popped into my head. A string turned number will trigger warnings, but s/// won't. I verified this in the Test::More fashion.