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Full Discussion: Find last occurrence of a character in a string
Top Forums Shell Programming and Scripting Find last occurrence of a character in a string Post 302814757 by Don Cragun on Thursday 30th of May 2013 07:01:01 AM
Old 05-30-2013
Assuming you're using a standards conforming shell (such as bash or ksh), this will also work:
Code:
str="aa-bbb-cccc-ddd-ee"
end=${str##*-}
echo "Last - is in column $((${#str} - ${#end}))"

and only uses shell built-ins.

With your sample string, it produces:
Code:
Last - is in column 16

 

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LEARN ABOUT DEBIAN

trna2sap

TRNA2SAP(1)						     NCBI Tools User's Manual						       TRNA2SAP(1)

NAME

       trna2sap - convert tRNAscan-SE output to an ASN.1 Seq-annot object

SYNOPSIS

       trna2sap [-] [-a] [-c str] [-f str] [-i filename] [-j] [-m str] [-n str] [-o filename] [-p dir] [-r dir] [-s] [-t str] [-u] [-x str]

DESCRIPTION

       trna2sap  reads	a  text  file  produced by tRNAscan-SE and produces a corresponding ASN.1 Seq-annot in the format understood by other NCBI
       tools.

OPTIONS

       A summary of options is included below.

       -      Print usage message

       -a     Add tRNAscan-SE citation

       -c str Comment

       -f str Substring Filter

       -i filename
	      Single Input file (standard input by default)

       -j     Just produce a five-column feature table, a la trna2tbl(1).

       -m str ReMark

       -n str Annotation Name (normally "tRNA").

       -o filename
	      Single Output file (standard output by default)

       -p dir Path to files

       -r dir Path for Results

       -s     Ignore Pseudo tRNAs

       -t str Annotation Title (normally "tRNAscan-SE").

       -u     Ignore Undetermined tRNAs

       -x str File selection suffix with -p (.trna by default).

AUTHOR

       The National Center for Biotechnology Information.

SEE ALSO

       sequin(1), tbl2asn(1), trna2tbl(1).

NCBI
								    2006-01-11							       TRNA2SAP(1)
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