CODEWITHSUNDEEP
arraysbash
Ren
Ren

Reputation: 51

Value presence in the array pt.2

Let's have an array:

echo $run
CEADAPST CENIPT CEDAMT CEODST +ASM CEREMAFT

Let's look if some values are present in the array or not (second and forth values are correct yet they are not found):

for dbname in CEREMAF CEREMAFT CEREMAFg +ASM; do if [[ " ${run[@]} " =~ " ${dbname} " ]]; then echo "you're golden!"; else echo "nope"; fi; done
nope
nope
nope
nope

Let's remove the space expansion, whole idea was to avoid similar words and go only for exact match:

for dbname in CEREMAF CEREMAFT CEREMAFg +ASM; do if [[ ${run[@]} =~ ${dbname} ]]; then echo "you're golden!"; else echo "nope"; fi; done
you're golden!
you're golden!
nope
nope

We do get some matches in the last case but the first match is a false correct (only similar because we removed the space expansion) and the fourth is still not found (probably because of plus sign). I clearly misunderstood the concept I found here on SO but I was not able to make it working and man, I tried... Why it doesn't work?

Upvotes: 1

Views: 41

Answers (2)

0.sh
0.sh

Reputation: 2762

use this function to handle that, it uses namereferening and two nested iteration to get you your desired result

run=( CEADAPST CENIPT CEDAMT CEODST +ASM CEREMAFT );

arrayIn() {
    local value=$1;
    local -n array=$2;

    local found=0;

    for val in "${array[@]}";do
        [[ "$val" != "$value" ]] && {
            found=0;
        } || {
            found=1;
            break;
        }
    done

    (( found == 0 )) && return 1;
    return 0;
}

for dbname in CEREMAF CEREMAFT CEREMAFg +ASM;do
    arrayIn $dbname run
    (( $? == 0 )) && { echo "yes"; } || echo "nope"
done

namereferencing

Upvotes: 1

iBug
iBug

Reputation: 37237

Try 

for dbname in (whatever) \\+ASM; do ...
                         ^^

Note the addition of double slashes.

From help [[:

When the `=~' operator is used, the string to the right of the operator is matched as a regular expression.

So what does regex +ASM mean? Nope, it's malformed. Escape the plus sign and it'll work

Upvotes: 1

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