Re^2: Regex Question

in reply to Re: Regex Question
in thread Regex Question

Good points.

For version, 5.10 appears to be the likely minimum - likely enough that anyone stuck with something earlier can be safely told they're on their own.

The data is, in fact, that strict. If it's not, there are likely bigger problems at work.

Many thanks!

What part of v_e = sqrt(2GM/r) don't you understand? It's only rocket science!

Comment on Re^2: Regex Question

Replies are listed 'Best First'.
Re^3: Regex Question by kcott (Archbishop) on Nov 08, 2016 at 00:24 UTC
Also be aware that the list of core modules can vary between versions. I've never personally encountered a problem with this; however, if it is an issue for you, you can specify a range of valid versions with use and no. Version too old: `$ perl -v \| head -2 \| tail -1 This is perl 5, version 18, subversion 0 (v5.18.0) built for darwin-th +read-multi-2level $ perl -e 'use 5.020; no 5.024' Perl v5.20.0 required--this is only v5.18.0, stopped at -e line 1. BEGIN failed--compilation aborted at -e line 1. $` [download] Version too new: `$ perl -v \| head -2 \| tail -1 This is perl 5, version 24, subversion 0 (v5.24.0) built for darwin-th +read-multi-2level $ perl -e 'use 5.020; no 5.024' Perls since v5.24.0 too modern--this is v5.24.0, stopped at -e line 1. BEGIN failed--compilation aborted at -e line 1. $` [download] Version just right (Goldilocks zone): `$ perl -v \| head -2 \| tail -1 This is perl 5, version 22, subversion 0 (v5.22.0) built for darwin-th +read-multi-2level $ perl -e 'use 5.020; no 5.024' $` [download] — Ken	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^3: Regex Question
by kcott (Archbishop) on Nov 08, 2016 at 00:24 UTC

Also be aware that the list of core modules can vary between versions. I've never personally encountered a problem with this; however, if it is an issue for you, you can specify a range of valid versions with use and no.

Version too old:

$ perl -v | head -2 | tail -1
This is perl 5, version 18, subversion 0 (v5.18.0) built for darwin-th
+read-multi-2level
$ perl -e 'use 5.020; no 5.024'
Perl v5.20.0 required--this is only v5.18.0, stopped at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
$
[download]

Version too new:

$ perl -v | head -2 | tail -1
This is perl 5, version 24, subversion 0 (v5.24.0) built for darwin-th
+read-multi-2level
$ perl -e 'use 5.020; no 5.024'
Perls since v5.24.0 too modern--this is v5.24.0, stopped at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
$
[download]

Version just right (Goldilocks zone):

$ perl -v | head -2 | tail -1
This is perl 5, version 22, subversion 0 (v5.22.0) built for darwin-th
+read-multi-2level
$ perl -e 'use 5.020; no 5.024'
$
[download]

— Ken

[reply]
[d/l]
[select]

In Section Seekers of Perl Wisdom