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Groups > linux.debian.user > #224795 > unrolled thread
| Started by | Albretch Mueller <lbrtchx@gmail.com> |
|---|---|
| First post | 2020-07-14 15:00 +0200 |
| Last post | 2020-08-07 03:10 +0200 |
| Articles | 1 on this page of 41 — 14 participants |
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delimiters with more than one character? ... Albretch Mueller <lbrtchx@gmail.com> - 2020-07-14 15:00 +0200
Re: delimiters with more than one character? ... Alex Mestiashvili <amestia@rsh2.donotuse.de> - 2020-07-14 15:00 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-14 15:10 +0200
Re: delimiters with more than one character? ... Nicolas George <george@nsup.org> - 2020-07-14 15:10 +0200
Re: delimiters with more than one character? ... Alex Mestiashvili <amestia@rsh2.donotuse.de> - 2020-07-14 15:20 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-14 15:10 +0200
Re: delimiters with more than one character? ... Nicolas George <george@nsup.org> - 2020-07-14 15:20 +0200
Re: delimiters with more than one character? ... Nicolas George <george@nsup.org> - 2020-07-14 17:30 +0200
Re: delimiters with more than one character? ... Albretch Mueller <lbrtchx@gmail.com> - 2020-07-15 12:30 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-15 14:00 +0200
Re: delimiters with more than one character? ... David Wright <deblis@lionunicorn.co.uk> - 2020-07-15 14:30 +0200
Re: delimiters with more than one character? ... Bob Weber <bobrweber@gmail.com> - 2020-07-15 14:40 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-15 14:50 +0200
Re: delimiters with more than one character? ... Bob Weber <bobrweber@gmail.com> - 2020-07-15 16:20 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-15 16:30 +0200
Re: delimiters with more than one character? ... The Wanderer <wanderer@fastmail.fm> - 2020-07-15 16:30 +0200
Re: delimiters with more than one character? ... Nicolas George <george@nsup.org> - 2020-07-15 17:50 +0200
Re: delimiters with more than one character? ... Nicolas George <george@nsup.org> - 2020-07-15 15:10 +0200
Re: delimiters with more than one character? ... Bob Weber <bobrweber@gmail.com> - 2020-07-14 17:30 +0200
Re: delimiters with more than one character? ... Alessandro Baggi <alessandro.baggi@gmail.com> - 2020-07-15 17:30 +0200
Re: delimiters with more than one character? ... Eric S Fraga <e.fraga@ucl.ac.uk> - 2020-07-16 12:10 +0200
Re: delimiters with more than one character? ... "Thomas Schmitt" <scdbackup@gmx.net> - 2020-07-16 13:40 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-16 14:00 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-16 16:00 +0200
Re: delimiters with more than one character? ... Zenaan Harkness <zenaan@freedbms.net> - 2020-07-17 04:50 +0200
Re: delimiters with more than one character? ... Nicolas George <george@nsup.org> - 2020-07-17 10:50 +0200
Re: delimiters with more than one character? ... rhkramer@gmail.com - 2020-07-17 13:20 +0200
tmpfs is not a ramdisk (was: delimiters with more than one character? ...) Nicolas George <george@nsup.org> - 2020-07-17 13:30 +0200
Re: tmpfs is not a ramdisk (was: delimiters with more than one character? ...) David Wright <deblis@lionunicorn.co.uk> - 2020-07-17 18:20 +0200
Re: tmpfs is not a ramdisk (was: delimiters with more than one character? ...) rhkramer@gmail.com - 2020-07-17 20:30 +0200
Re: tmpfs is not a ramdisk (was: delimiters with more than one character? ...) Zenaan Harkness <zenaan@freedbms.net> - 2020-07-18 07:20 +0200
Re: tmpfs is not a ramdisk (was: delimiters with more than one character? ...) <tomas@tuxteam.de> - 2020-07-18 10:40 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-07-17 13:40 +0200
Re: delimiters with more than one character? ... "Thomas Schmitt" <scdbackup@gmx.net> - 2020-07-16 16:00 +0200
Re: delimiters with more than one character? ... Zenaan Harkness <zenaan@freedbms.net> - 2020-07-17 04:50 +0200
Re: delimiters with more than one character? ... Eric S Fraga <e.fraga@ucl.ac.uk> - 2020-07-16 15:00 +0200
Re: delimiters with more than one character? ... John Crawley <john@bunsenlabs.org> - 2020-08-05 08:30 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-08-05 15:10 +0200
Re: delimiters with more than one character? ... John Crawley <john@bunsenlabs.org> - 2020-08-06 05:00 +0200
Re: delimiters with more than one character? ... Greg Wooledge <wooledg@eeg.ccf.org> - 2020-08-06 13:40 +0200
Re: delimiters with more than one character? ... John Crawley <john@bunsenlabs.org> - 2020-08-07 03:10 +0200
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| From | John Crawley <john@bunsenlabs.org> |
|---|---|
| Date | 2020-08-07 03:10 +0200 |
| Message-ID | <AAZ3s-QZ-3@gated-at.bofh.it> |
| In reply to | #225934 |
On 2020-08-06 20:33, Greg Wooledge wrote:
> For short strings, doing this sort of parsing in bash is fine. But as
> you can see, on large inputs, it does not scale well. The fact that each
> iteration makes a *copy* of nearly the entire remaining input doesn't
> help matters, either -- right off the bat, that algorithm makes the run
> time explode, even before you take into account bash's 100% interpreted
> runtime slowness.
Thanks for the insights.
So, re: the OP's question, it's possible in bash, but there's unlikely
to be an efficient way for long strings.
But (unwilling to give up) IF it can be guaranteed that the string will
never contain newlines, then this is about 16x faster than the
snip-and-loop version:
---
#!/bin/bash
_S=' 34 + 45 \| abc \| 1 2 3 \| c\|123abc '
del='\|'
mapfile -t arr <<< ${_S//"${del}"/$'\n'}
declare -p arr
---
Seems to accept unusual characters and empty items.
Awk can ignore newlines, but a lot of the other shell tools are
line-based anyway.
--
John
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