Re: How do I use grep in a script

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Re^2: How do I use grep in a script by Laurent_R (Canon) on Dec 26, 2017 at 20:16 UTC
The OP wants to do it in Perl. I'm afraid it is somewhat counterproductive to suggest shelling out of Perl with backticks or `qx//`.	[reply] [d/l]
Re^3: How do I use grep in a script by ForgotPasswordAgain (Vicar) on Dec 27, 2017 at 17:17 UTC
Though there's value in learning how to do it in Perl, I respectfully disagree about the "counterproductive" part. The one-liner being done, just wrap backticks around it, use a split /\n/, and that's that (unless there are other constraints). I wouldn't be surprised if it were also faster, though that depends and might not matter.	[reply]
Re^4: How do I use grep in a script by Laurent_R (Canon) on Dec 27, 2017 at 21:17 UTC
It is usually a recommended good practice not to shell out to the system when you can avoid it. And there are many good reasons for that, security and portability just to name a few. I think it should be avoided especially when the commands you want to run exists in core Perl. See, for example, Calling External Commands More Safely and The problem of "the" default shell.	[reply]
Re^5: How do I use grep in a script by ForgotPasswordAgain (Vicar) on Dec 28, 2017 at 00:30 UTC
Re^6: How do I use grep in a script by karlgoethebier (Abbot) on Dec 28, 2017 at 20:44 UTC
Re^6: How do I use grep in a script by Laurent_R (Canon) on Dec 28, 2017 at 16:45 UTC
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