[Leaplist] teach me please about this code

[tonyb]

The short answer is: I don't know.  The velocity of change in open
source is too great for me to keep track of what features are available
when and where.  I simply try to maintain a working subset.

Cheers,

Tony


John Simpson wrote:
...
> 
> is the ${...%pattern} operator specific to bash, or does it work with
> any /bin/sh variant?
> 
> reading the man page about it, i also find a ${.../pattern/string}
> operator. i remember reading about these before, but i couldn't get my
> head wrapped around what they were doing, and it wasn't relevant to what
> i was working on at the time, so i ignored it but always meant to get
> back to it... and of course, never did.
> 
> i just wrote a test script to show me what these operators actually do.
> i find it easier to understand if i can see a list of "before and after"
> cases...
> 
> $x              abc_123_abc_789_abc
> ${x%abc}XYZ     abc_123_abc_789_XYZ
> ${x#abc}XYZ     _123_abc_789_abcXYZ
> ${x/abc/XYZ}    XYZ_123_abc_789_abc
> ${x//abc/XYZ}   XYZ_123_XYZ_789_XYZ
> ${x/#abc/XYZ}   XYZ_123_abc_789_abc
> 
> ----------------------------------------------------------------
> | John M. Simpson    ---   KG4ZOW   ---    Programmer At Large |
> | http://www.jms1.net/                         <jms1 at jms1.net> |
> ----------------------------------------------------------------
> | http://video.google.com/videoplay?docid=-1656880303867390173 |
> ----------------------------------------------------------------
> 
> 
> 
> 
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-- 
May all your bits be in the correct order.