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Top Forums Shell Programming and Scripting Find all matching words in text according to pattern Post 302825987 by radoulov on Tuesday 25th of June 2013 03:14:45 PM
Old 06-25-2013
Quote:
Originally Posted by Grünspanix
But now I realize: you use the first as anchor character "^" to define, that at the beginning of the line the following expression in '(...)' must follow. I was confused initially as the grymoire docs described the anchor to be used "on the beginning of a line" - and then I wasn't sure where the "line" was in this case. Was it the original "$line" or the splitted parts of the line? Obviously in this case every splitted part is its own "line". Thats why it works. Eventually I understood Smilie
Correct, perhaps "the beginning of the string" would be more appropriate.

Quote:
Regarding Perl: yeah, there was the choice between perl or bash scripts and then the thought came "use something which is always available and more down-to-earth" - and the decision fell to default shell scripts.

While it is an interesting learning experience I have previously used some perl and it was way more comfortable. I am not sure the pure shellscripting decision was right after all, especially seeing that perl is installed on most unix machines anyways...sigh, but what can you do.
That's OK, actually. I almost always use only pure shell scripting too, but Perl makes the string manipulation really, really easy.
Moreover, Perl is often available even where bash is not (an old HP-UX springs to mind Smilie).
 

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LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
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