Re: Smart-search/When question

Because qw// constructs a list not an array.

When you did this:

given ($ext) {
    when (qw/jpeg jpg png/) {
[download]

You should have seen the warning:

Useless use of a constant in void context at
[download]

You could do it in-line as:

given ($ext) {
    when ( @{[ qw/jpeg jpg png/] ]} ) {
[download]

But it's a bit cheesy.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

Comment on Re: Smart-search/When question Select or Download Code

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Re^2: Smart-search/When question by John M. Dlugosz (Monsignor) on Mar 18, 2011 at 07:46 UTC
What's the difference between a list and an array, as far as `when` is concerned? What's an example of a list used here that is different from the meaning of an array with the same elements?	[reply] [d/l]
Re^3: Smart-search/When question by BrowserUk (Patriarch) on Mar 18, 2011 at 08:44 UTC
What's the difference between a list and an array, as far as when is concerned? This is one of the ways that given/when break expectations in that in most cases, the use of an array expression `@a` generates a list. The only other exception to this I can think of is a subroutine with a prototype of `(\@)` which causes a reference to the array to be passed to the subroutine. I think that's what is happening here, though the documentation leave much to be desired. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply] [d/l] [select]