Re: Determine first element in foreach

You can use a for loop instead of foreach

for ($i = 0; $i < $#mylist ; $i++) {
   say "first element" if ( $i == 0 );
}
[download]

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Re^2: Determine first element in foreach by tobyink (Canon) on Aug 04, 2014 at 20:12 UTC
Even when you want to loop over the indexes, you can still use a `foreach`-style loop: `foreach my $i (0 .. $#mylist) { say "first element" if ( $i == 0 ); }` [download] `foreach`-style loops are generally a better idea that C-style `for` loops. They're clearer; more declarative. It's harder to introduce an off-by-one error, and easier to spot a mistake. toby döt ink	[reply] [d/l] [select]
Re^3: Determine first element in foreach by AnomalousMonk (Archbishop) on Aug 04, 2014 at 20:45 UTC
It's harder to introduce an off-by-one error, and easier to spot a mistake. Indeed. Consider `for ($i = 0; $i < $#mylist ; $i++) { ... }` in reply above: `$i < $#mylist` vice `$i <= $#mylist` — or did you have that in mind?	[reply] [d/l] [select]
Re^4: Determine first element in foreach by tobyink (Canon) on Aug 05, 2014 at 07:17 UTC
I hadn't even noticed that! (Which is precisely my point.) toby döt ink	[reply]