Hi all, I got stuck up on this regular expression. The file is a multi line file with a Name=Value record on each line. The Value is a comma seperated record with multiple fields. missing fields are represented by continous commas. I have a pattern in the middle of each line, which is as follows Word ResGen preceded by a comma which is preceded by a comma OR any word and a comma which is preceded by a comma OR any word and a comma Which may or may not be preceded by a ". I need to see weather a " quote is present or not present. If " is not present add a " in this location. I am including some of the sample lines of this file. The example lines do not show the exhaustive list of possibilites. Example sample lines 
GENE1="Rattus norvegicus serum and glucocorticoid-regulated kinase (sg
+k) mRNA, complete cds,NM_019232,333,ResGen,ATP binding|protein serine
+/threonine kinase|protein amino acid phosphorylation,,,,29517
GENE2="ESTs, Weakly similar to putative serine/threonine protein kinas
+e MAK-V [M.musculus]",NM_144755,331,ResGen,,,,,246273
GENE3="Thiosulfate sulphurtransferase (rhodanese)",X56228,329,ResGen,m
+itochondrion|sulfate transport|thiosulfate sulfurtransferase,,,,25274
GENE4="Spleen tyrosine kinase,NM_012758,327,ResGen,ATP binding|protein
+ tyrosine kinase|intracellular signaling cascade|protein amino acid p
+hosphorylation,,,,25155
GENE5="Spleen kinase 24,NM_012758,,ResGen,ATP binding|protein tyrosine
+ kinase|intracellular signaling cascade|protein amino acid phosphoryl
+ation,,,,25155

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Thanks & Best regards to all PerlMonks vemana

In reply to Need method to create Regular expression for known pattern in the middle of a line by Ya

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