replacing / with - in bash
in [Shell]
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From: Russ P. on 6 May 2010 20:04 I am writing a bash script that needs to convert a directory name that is several levels deep to another directory name with no subdirectories. To do that, I will change all the slashes to dashes. Is there a simple way to do this in bash? Thanks. In other words, I need to replace slash with dash in bash. It just occurred to me that I am a poet and didn't even know it. Russ P.
From: Seebs on 6 May 2010 20:17 On 2010-05-07, Russ P. <russ.paielli(a)gmail.com> wrote: > I am writing a bash script that needs to convert a directory name that > is several levels deep to another directory name with no > subdirectories. To do that, I will change all the slashes to dashes. > Is there a simple way to do this in bash? Thanks. > > In other words, I need to replace slash with dash in bash. It just > occurred to me that I am a poet and didn't even know it. $(echo "$foo" | tr / -) There's probably a bashism for this, but I wouldn't bother, usually. -s -- Copyright 2010, all wrongs reversed. Peter Seebach / usenet-nospam(a)seebs.net http://www.seebs.net/log/ <-- lawsuits, religion, and funny pictures http://en.wikipedia.org/wiki/Fair_Game_(Scientology) <-- get educated!
From: Russ P. on 6 May 2010 21:13 On May 6, 5:17 pm, Seebs <usenet-nos...(a)seebs.net> wrote: > On 2010-05-07, Russ P. <russ.paie...(a)gmail.com> wrote: > > > I am writing a bash script that needs to convert a directory name that > > is several levels deep to another directory name with no > > subdirectories. To do that, I will change all the slashes to dashes. > > Is there a simple way to do this in bash? Thanks. > > > In other words, I need to replace slash with dash in bash. It just > > occurred to me that I am a poet and didn't even know it. > > $(echo "$foo" | tr / -) > > There's probably a bashism for this, but I wouldn't bother, usually. > > -s > -- > Copyright 2010, all wrongs reversed. Peter Seebach / usenet-nos...(a)seebs.nethttp://www.seebs.net/log/<-- lawsuits, religion, and funny pictureshttp://en.wikipedia.org/wiki/Fair_Game_(Scientology) <-- get educated! Fabulous! Thanks.
From: Ben Finney on 6 May 2010 21:29 "Russ P." <russ.paielli(a)gmail.com> writes: > I am writing a bash script that needs to convert a directory name that > is several levels deep to another directory name with no > subdirectories. To do that, I will change all the slashes to dashes. Since pedantry is a tradition in such forums: The U+002D HYPHEN-MINUS ('-') is not a dash. > Is there a simple way to do this in bash? Thanks. $ d="foo/rendered bacon fat/bar" $ echo "${d//\//-}" foo-rendered bacon fat-bar The leaning toothpicks are explained in 'bash(1)', the “Parameter Expansion” subsection: ${parameter/pattern/string} Pattern substitution. The pattern is expanded to produce a pattern just as in pathname expansion. Parameter is expanded and the longest match of pattern against its value is replaced with string. If pattern begins with /, all matches of pattern are replaced with string. Normally only the first match is replaced. […] -- \ “The Way to see by Faith is to shut the Eye of Reason.” | `\ —Benjamin Franklin | _o__) | Ben Finney
From: Ben Finney on 6 May 2010 21:57
"Russ P." <russ.paielli(a)gmail.com> writes: > On May 6, 5:17 pm, Seebs <usenet-nos...(a)seebs.net> wrote: > > On 2010-05-07, Russ P. <russ.paie...(a)gmail.com> wrote: > > > In other words, I need to replace slash with dash in bash. It just > > > occurred to me that I am a poet and didn't even know it. > > > > $(echo "$foo" | tr / -) > > > > There's probably a bashism for this, but I wouldn't bother, usually. > > Fabulous! Thanks. Be aware that this will impose the overhead of three extra processes for every such substitutiontransformation you want to do. That overhead may be acceptable for your use case, but you should still be aware of it. Doing it with a Bash parameter substitution will perform the substitution all in the same process (zero extra processes). -- \ “The industrial system is profoundly dependent on commercial | `\ television and could not exist in its present form without it.” | _o__) —John Kenneth Galbraith, _The New Industrial State_, 1967 | Ben Finney |