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11-25-2008
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Sed text replacement issue.
Hi,
Im trying to find and replace text within a unix file using sed. The command that i have been using is sed '/,null,/ s//, ,/g' result.txt>result.tmp for replacing ",null," with ", ,". But this only replaces the first occurrance of ,null, in every line. I want to do it globally. It works fine if i exclude all the commas. Please help. |
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11-25-2008
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Should be something like:
Code:
sed 's/,null,/, ,/g' result.txt > result.tmp |
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11-25-2008
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Quote:
Code:
sed -e "s/,null,/, ,/g" result.txt > result.tmp |
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11-25-2008
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sed -e "s/,null,/, ,/g" result.txt > result.tmp
sed 's/,null,/, ,/g' result.txt > result.tmp Both the above statements only replace the first occurance of ,null, to , , in each line. Could this be done in any other way? Im trying to modify the contents of a file using a shell script that first extracts this data and modifies it a bit. |
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11-25-2008
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It should work, post your file within code brackets (select the code and click on the "#" above the editing window).
Regards |
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11-25-2008
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Code:
2,520,DB_MSC_MIT,null,KBNY,BLAH,US,5876548,VBU3M.U,VZ0M.U,U,VZFSK,BK,0.772084,ER,10.0,1.0,A,P,1.0,0.0,2009-01-16T00:00:00 @Europe/London,0.0,35.0,To La,1.0,1.6936391,7.07878526,6.629309,242.30009,Amer,1.3309,0.0,0.0,0.0,922.808018,312.3315240926514338,29.83157600000000,574,37.53658120375646,0.0,0.0,0.0,1.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,-26.10513536513008,0.0,-74951.16306028693,-26.10513536513008,-74925.0579249218,0.0,0.0,0.0,0.0,0.0,0.0,-237.22390960441317,0.0,4896.289228465125,-237.22390960441317,5133.513138069538,0.0,0.0,0.0,0.0,0.0,0.0,-4755.8670072606055,0.0,458181.9339556703,-4755.8670072606055,462937.8009629309,null,null,null,0.0,O,VZFRP JAN 09 35 P,null,null,1.0,null,VP35 1.0,null,null,null,O,BSK,BSK,null,null,DrFr,NY,NY,null,0.0,0.0,0.0,0.0,0.0,0.0,0.0,2,0.0,0.0,0.0 |
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11-25-2008
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Both ways are working on my boxes... Though maybe try something like (even I think it is unnecessary):
Code:
sed -e :a -e 's/,null,/, ,/;ta' result.txt Just saw the long example line. With the shown line the 2 sed commands do not work on my boxes - I guess because of the already substituted adjacent commas of following ,null,null. So the loop in sed will be ok. Last edited by zaxxon; 11-25-2008 at 07:15 AM.. Reason: Added info |
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