extract string variables defined in an array based on pattern

Question

Special parameter "$@" contains the following string variables,

echo $@ outputs: a.bdf, b.bdf,c.nas,d.nas

I want to extract the string variables with extension 'bdf' and save it in another array. Is it possible to do so in bash?

it should help: bash: how to delete elements from an array based on a pattern — RomanHotsiy
– RomanHotsiy, Commented Jul 18, 2014 at 8:10
"$@ outputs: a.bdf, b.bdf,c.nas,d.nas" I see both , and ` ` (space) between values. Are the , being part of the data or only separators? — Sylvain Leroux
– Sylvain Leroux, Commented Jul 18, 2014 at 11:15

Aserre · Accepted Answer · 2014-07-18 08:32:27Z

1

Just iterate through it with a for loop :

for ARG in "$@";do
    if [[ "$ARG" == *.bdf ]];then
        BDF_ARRAY+=("$ARG")    #you don't need to initialize this array before the loop in bash
    else                       #optional block, if you want to split $@ in 2 arrays
        OTHER_ARRAY+=("$ARG")  
    fi
done

echo ${BDF_ARRAY[@]}
echo ${OTHER_ARRAY[@]}

edited Jul 18, 2014 at 8:32

answered Jul 18, 2014 at 8:11

Aserre

5,1425 gold badges38 silver badges59 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

user3442743 · Accepted Answer · 2014-07-18 08:17:11Z

0

Using for loop

for i in "$@";do
    if [[ "${i##*.}" == bdf ]]; then
        ARRAY2+=("$i")
    fi
done

answered Jul 18, 2014 at 8:17

user3442743

Comments

Sylvain Leroux · Accepted Answer · 2014-07-18 11:52:38Z

0

In the generic case:

#!/bin/bash

for i in "$@"; do
    case "$i" in
        *.bdf)  BDF_ARRAY+=("$i")
                ;;
        *.nas)  NAS_ARRAY+=("$i")
                ;;
    esac
done

for i in "${BDF_ARRAY[@]}"; do echo "BDF: $i"; done
for i in "${NAS_ARRAY[@]}"; do echo "NAS: $i"; done

answered Jul 18, 2014 at 11:52

Sylvain Leroux

52.3k8 gold badges114 silver badges136 bronze badges

Collectives™ on Stack Overflow

extract string variables defined in an array based on pattern

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related