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Top Forums Shell Programming and Scripting How to prepend filename to its content without a third file? Post 302972782 by Don Cragun on Tuesday 10th of May 2016 08:02:32 PM
Old 05-10-2016
If you know vim, you know a lot more about ed than you think you do.

If you're in vim and you type in the command:
Code:
:1i

and then type in the two lines:
Code:
geneID  filename
.

What will happen. (It will insert the text geneID filename as a new line of text that will appear before the 1st line that was in the file before.)

And then what happens if you type in the command:
Code:
:w

(It will write the updated buffer back to the file you are editing.)

The ed (and ex) utilities give you most of the commands that you type into vim that start with a colon, but do not need (or accept) the colon.
This User Gave Thanks to Don Cragun For This Post:
 

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BP_GCCALC(1p)						User Contributed Perl Documentation					     BP_GCCALC(1p)

NAME
gccalc - GC content of nucleotide sequences SYNOPSIS
gccalc [-f/--format FORMAT] [-h/--help] filename or gccalc [-f/--format FORMAT] < filename or gccalc [-f/--format FORMAT] -i filename DESCRIPTION
This scripts prints out the GC content for every nucleotide sequence from the input file. OPTIONS
The default sequence format is fasta. The sequence input can be provided using any of the three methods: unnamed argument gccalc filename named argument gccalc -i filename standard input gccalc < filename FEEDBACK
Mailing Lists User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to the Bioperl mailing list. Your participation is much appreciated. bioperl-l@bioperl.org - General discussion http://bioperl.org/wiki/Mailing_lists - About the mailing lists Reporting Bugs Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their resolution. Bug reports can be submitted via the web: https://redmine.open-bio.org/projects/bioperl/ AUTHOR - Jason Stajich Email jason@bioperl.org HISTORY
Based on script code (see bottom) submitted by cckim@stanford.edu Submitted as part of bioperl script project 2001/08/06 perl v5.14.2 2012-03-02 BP_GCCALC(1p)
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