Regular expression -tab

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# 8  
Old 06-29-2011
$nawk '{for(i=1;i<=NF;i++){if(i==1){printf("%s\t",$i);}else if(i==2){printf("%s ",$i);} else {printf(" %s",$i);} if(i==NF)printf("\n"); }}' inputfile
cgd1_1060       GO:0003674  // GO:0005488
cgd1_1070       GO:0003674  // GO:0003676 // GO:0005488
cgd1_1100       GO:0003674  // GO:0003824 // GO:0004177 // GO:0006508 // GO:0008150 // GO:0008152 // GO:0008233 // GO:0008238 // GO:0008239 // GO:0008451 // GO:0009987 // GO:0016787 // GO:0016806 // GO:0017088 // GO:0019538 // GO:0043170 // GO:0044237 // GO:0044238 // GO:0044260 // GO:0044267
cgd1_1110       GO:0006629  // GO:0006643 // GO:0006644 // GO:0006650 // GO:0006658 // GO:0006659 // GO:0008150 // GO:0008152 // GO:0008610 // GO:0008654 // GO:0009058 // GO:0009987 // GO:0044237 GO:0044238 // GO:0044255 // GO:0046467 // GO:0046474

This User Gave Thanks to itkamaraj For This Post:
# 9  
Old 06-29-2011 worked
# 10  
Old 06-29-2011
perl -lne 's/\s+/\t/;print' inp

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