Re^2: Populating an Array of hash's

Thanks, that actually did the trick, but I have a question. What does the line below do? It looks like its taking the @files array and mapping them into a hash, which is getting mapped to the array FILES which HTML::Template then parses??


$template->param(
FILES => [ map +{ NAME => $_ }, @files ],
);
[download]

What is this line doing?

 map +{ NAME -> $_}
[download]

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Re^3: Populating an Array of hash's by ikegami (Patriarch) on Oct 02, 2008 at 02:13 UTC
`map +{ NAME => $_ }, LIST` is another way of writing `map { { NAME => $_ } } LIST` The expression `{ NAME => $_ }` creates a hash, assigns `NAME => $_` to it (creating a key named `NAME` whose associated value is `$_`), and returns a reference to the hash. The expression `map { { NAME => $_ } } @files` For every element of `@files`, sets `$_` to the element executes the sub-expression. A list is formed from the result of the sub-expressions and returned. In other words, `$template->param( FILES => [ map +{ NAME => $_ }, @files ], );` [download] could have been written `my @files_param; for (@files) { push @files_param, { NAME => $_ }; } $template->param(\@files_param);` [download]	[reply] [d/l] [select]

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Re^3: Populating an Array of hash's
by ikegami (Patriarch) on Oct 02, 2008 at 02:13 UTC

map +{ NAME => $_ }, LIST
is another way of writing
map { { NAME => $_ } } LIST

The expression { NAME => $_ }

creates a hash,
assigns NAME => $_ to it (creating a key named NAME whose associated value is $_), and
returns a reference to the hash.

The expression map { { NAME => $_ } } @files

For every element of @files,
1. sets $_ to the element
2. executes the sub-expression.
A list is formed from the result of the sub-expressions and returned.

In other words,

$template->param(
   FILES => [ map +{ NAME => $_ }, @files ],
);
[download]

could have been written

my @files_param;
for (@files) {
   push @files_param, { NAME => $_ };
}
$template->param(\@files_param);
[download]

[reply]
[d/l]
[select]