sed command

ROOZ · #1 (**permalink**) 06-05-2008

Hi everyone,
I am trying to extract two numbers from a string using sed command,
does anyone have any idea how to do this
for instance: the string is sadaskjer4x5sdfrsdf
and i would like to search for 4x5 and and extract 4 and 5 and save them into two variables.

era · #2 (**permalink**) 06-05-2008

Code:

set -- `echo "$string" | sed -e 's/[^0-9][^0-9]*/ /g'`
echo First value is $1
echo Second value is $2

The set -- `command` idiom is rather obscure, but it's nevertheless a standard technique for splitting whitespace-separated tokens into the shell's positional variables. After the set, the first token in the output from command will be in $1, the second in $2, etc, and $# will tell you how many there were, just like when a script is invoked with command-line parameters.

If this is too weird for you then try the following.

Code:

variable1=`echo "$string" | sed -e 's/^[^0-9]*\([0-9][0-9]*\).*/\1/'`
variable2=`echo "$string" | sed -e 's/.*\([0-9][0-9]*\)[^0-9]*$/\1/'`

The first will grab the first number in the string, and the second, the last. If there are more, they will be lost.

jaduks · #3 (**permalink**) 06-05-2008

Code:

$ eval $(echo "sadaskjer4x5sdfrsdf" | sed 's/[a-z].*\([0-9]x[0-9]\).*/\1/'| awk -F"x" '{print "first="$1";second="$2}')

$ echo $first
4

$ echo $second
5

//Jadu

jim mcnamara · #4 (**permalink**) 06-05-2008

Do not post duplicate questions in separate sub-forums. Now, you have one question in two places, with seperate answers as well.

ROOZ · #5 (**permalink**) 06-05-2008

thx a lot for the quick response. it works just fine

ROOZ · #6 (**permalink**) 06-05-2008

hey Jim,
It wasn't intentional. i posted in a wrong place and i didn't know how to get rid of it.

ROOZ · #7 (**permalink**) 06-05-2008

it wasn't intentional. i posted the message in a wrong place and i didn't know how to get rid of it.

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