Re: What does the short circuit || mean ?

On the first line, || evaluates the left side first. If it's true, it gets assigned to $ct, otherwise, $ct becomes text/plain.

On line 2, you can add parentheses as follows:

(($ct eq 'text/plain') || ($ct eq 'text/html')) or next;
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which makes it equivalent to

next if $ct ne 'text/plain' and $ct ne 'text/html';
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The "short circuiting" is most noticable in the or operator: next is evaluated only if the previous condition is false.

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Comment on Re: What does the short circuit \|\| mean ? Select or Download Code

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Re^2: What does the short circuit \|\| mean ? by peterr (Scribe) on Mar 10, 2015 at 01:06 UTC
Thanks choroba for explaining that. It's like saying if `$part->contentType` is undefined, `$ct` will default to a value of "text/plain"	[reply] [d/l] [select]
Re^3: What does the short circuit \|\| mean ? by AnomalousMonk (Archbishop) on Mar 10, 2015 at 01:22 UTC
... if `$part->contentType` is undefined ... This is a little tricky, but to be precise, you're saying "if `$part->contentType` is false", then do something. In Perl, falsity is represented by any of: undef (the undefined value), "" (the empty string), 0 (numeric zero), or '0' (a string consisting of a single 0 character). Use the `//` operator to test specifically for defined-ness. Update: See also True and False (aka Booleans). Give a man a fish: `<%-(-(-(-<`	[reply] [d/l] [select]
Re^4: What does the short circuit \|\| mean ? by peterr (Scribe) on Mar 10, 2015 at 01:36 UTC
Thanks AnomalousMonk, that is a great guide for understanding true or false.	[reply]