Help with a regular expression???

[accessys at smart.net]

Sorry wrong list.

Bob



On Wed, 27 Jan 2010 accessys at smart.net wrote:

> Date: Wed, 27 Jan 2010 14:22:48 -0500 (EST)
> From: accessys at smart.net
> To: "Ubuntu user technical support, not for general discussions"
>     <ubuntu-users at lists.ubuntu.com>
> Subject: Re: Help with a regular expression???
> 
>
>
> no only has to be 5ft in one direction. and a stairway landing does not need 
> to meet the 5ft landing anyway that is for ramps.
>
> sorry misunderstood the question
> Bob
>
>
>
> On Wed, 27 Jan 2010, Ray Parrish wrote:
>
>> Date: Wed, 27 Jan 2010 11:07:02 -0800
>> From: Ray Parrish <crp at cmc.net>
>> Reply-To: "Ubuntu user technical support, not for general discussions"
>>     <ubuntu-users at lists.ubuntu.com>
>> To: "Ubuntu user technical support, not for general discussions"
>>     <ubuntu-users at lists.ubuntu.com>
>> Subject: Re: Help with a regular expression???
>> 
>> James Michael Fultz wrote:
>>> * James Michael Fultz <croooow at gmail.com> [2010-01-27 13:04 -0500]:
>>> 
>>>> * Ray Parrish <crp at cmc.net> [2010-01-27 09:04 -0800]:
>>>> 
>>>>> Amedee Van Gasse (ub) wrote:
>>>>> 
>>>> [...]
>>>> 
>>>>>> The same regex syntax can be used with the bash command sed:
>>>>>> 
>>>>>> sed 's/    ([^ ])/_ \1/g'
>>>>>> 
>>>> [...]
>>>> 
>>>>> DescriptionSection=`echo | sed 's/    ([^ ])/_ \1/g'`
>>>>> echo "$DescriptionSection"
>>>>> 
>>>>> And I get the following cryptic error, which tells me nothing. Can 
>>>>> you help?
>>>>> 
>>>>> sed: -e expression #1, char 19: invalid reference \1 on `s' 
>>>>> command's RHS
>>>>> 
>>>> DescriptionSection=`echo | sed 's/    \([^ ]\)/_ \1/g'`
>>>> 
>>> [...]
>>> 
>>> Oops!  Overlooked one other thing.
>>> 
>>> DescriptionSection=`echo "$SomeVar" | sed 's/    \([^ ]\)/_ \1/g'`
>>> 
>>> Where '$SomeVar' is a variable whose contents you wish to process.
>>> Also, the following form using printf is actually safer.
>>> 
>>> DescriptionSection=`printf '%s\n' "$SomeVar" | sed 's/    \([^ ]\)/_ 
>>> \1/g'`
>>> 
>>> The reason printf is safer than echo being that printf ignores
>>> subsequent options (strings starting with a dash), whereas echo may
>>> misinterpret an arbitrary string beginning with a dash as an option.
>>> 
>> Hello again,
>> 
>> That has gotten it perfectly now. Thank you! I have the following code -
>> 
>> DescriptionSection="  - Multidimensional Array Objects
>>    * Efficient arrays of homogeneous machine types (floats, longs,
>>    complex doubles)
>>    * Arbitrary number of dimensions
>>      line continuation.
>>    * Sophisticated structural operations
>>  - Universal Function Objects
>>    * Support mathematical functions on all Python objects
>>    - Very efficient for array objects"
>> DescriptionSection=`echo "$DescriptionSection" | sed 's/      \([^
>> \*-]\)/_ \1/g'`
>> DescriptionSection=`echo "$DescriptionSection" | sed 's/    \([^
>> \*-]\)/_ \1/g'`
>> echo "$DescriptionSection"
>> 
>> Which outputs -
>> 
>>  - Multidimensional Array Objects
>>    * Efficient arrays of homogeneous machine types (floats, longs,
>> _ complex doubles)
>>    * Arbitrary number of dimensions
>> _ line continuation.
>>    * Sophisticated structural operations
>>  - Universal Function Objects
>>    * Support mathematical functions on all Python objects
>>    - Very efficient for array objects
>> 
>> Now I can finally run my other code over the DescriptionSection variable
>> to format it's text lists into HTML lists.
>> 
>> Later, Ray Parrish
>> 
>> 
>> --
>> Linux dpkg Software Report script set..
>> http://www.rayslinks.com/LinuxdpkgSoftwareReport.html
>> Ray's Links, a variety of links to usefull things, and articles by Ray.
>> http://www.rayslinks.com
>> Writings of "The" Schizophrenic, what it's like to be a schizo, and other
>> things, including my poetry.
>> http://www.writingsoftheschizophrenic.com
>> 
>> 
>> 
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>