Is there a way to print something into this first element?

I suspect you're after something more complex, but on the face of it, this seems to answer that question:

C:\test>type junk.dat
        A       B       C       D       E
A       1       1       1       1       1
B       1       1       1       1       1
C       1       1       1       1       1
D       1       1       1       1       1
E       1       1       1       1       1

C:\test>perl -plae" $.== 1 and $F[0] eq 'A' and $_ = 'ID' . $_" junk.d
+at
ID      A       B       C       D       E
A       1       1       1       1       1
B       1       1       1       1       1
C       1       1       1       1       1
D       1       1       1       1       1
E       1       1       1       1       1

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In reply to Re: Access and modify specific element of tab delimited .txt file by BrowserUk
in thread Access and modify specific element of tab delimited .txt file by K_Edw

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