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G'day Lady Aleena,

With regard to this line:

use v5.10.0;

Whenever I specify a minimum Perl version, I always put the use VERSION; statement as the first line of code. Let users know immediately if their Perl version is too old. There may be other benefits: such as enabling features; and, if you have use 5.012; (or later) you'll get use strict; for free (see use for details).

The documentation for use has:

use 5.024_001; # ditto; older syntax compatible with perl 5.6

While I generally wouldn't expect people to be using such old versions, i.e. 5.6 or earlier, I typically hedge my bets and use that format just in case.

In most cases, I don't include a subversion in the use VERSION; statement. However, 5.10.0 had a number of problems which were fixed in 5.10.1 — those changes were incompatible with 5.10.0 (see "perl5101delta: Incompatible Changes"). On the rare occasions that I've needed to specify 5.10 as a minimum version, I've used:

use 5.010_001;

— Ken

In reply to Re: RFC: How did I do writing my first test? by kcott
in thread RFC: How did I do writing my first test? by Lady_Aleena

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