I have a line that gets pulled from a database that has a variable number of fields, fields can also be of a variable size. Each field has a variable number of spaces between them so there is no 'defined' delimiter. The LastData block is always a single word.
What I want to do is delete the last word (LastData) on each line....
example line:-
Some Data More Data Specific Formatted Data EvenMore Data Bit More Data LastData EOL
The space after the LastData and EOL is deliberate to show how the data can come up.
So I have a sed as follows...
sed -e 's/ *$//' -e '/[ ][^ ]*$//' (Please note there IS a space (s) before the first (s)* and inbetween the [(s)] and also [^(s)]).
The first sed deletes any trailing spaces at the end of the line between 'LastData' and EOL and this works correcly.
However the second sed is deleting 'LastData' and the last word in 'Bit More Data' as well.
Could someone please explain to me where I'm going wrong, please don't just give an example that will work without explaining it else I won't learn from my misunderstanding.
I've used your sed command with two different versions of sed (gnu and AT&T AST's) and both work just fine.
Before looking at your try, I wrote one and did things just a bit differently:
Code:
# newlines only make it more readable
sed 's/[ \t]*$//;
s/[ \t][^ \t]+$//;
s/[ \t]*$//;'
The first subs command ditches trailing whitespace upto the end of line. The second, ditches the last word, and a preceding whitespace character. The third ditches any trailing whitespace that might have been left. The biggest difference is that it catches both tabs and spaces. If "data" and "lastdata" are separated by a tab, and not a space, your substitutions will see <space>data<tab>lastdata as the last 'word.'
Don't know if this is what is actually going on, but it's the only way I could explain it.
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I am having a file as stated below
File 1
sa0 -- i_core/i_core_apb/i_afe0_controller/U261/A
sa0 -- i_core/i_core_apb/i_afe0_controller/U265/Z
sa1 -- i_core/i_core_apb/i_afe0_controller/U265/A
sa1 -- i_core/i_core_apb/i_afe0_controller/U268/Z
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NEW
NEW
/v/engine
NEW
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NEW
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blah blah blah
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File1.txt
$
sweet appleŁ1
scotish
green
$
This is a test1
$
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$
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<b>adf<\c>
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