[PoC, bash] check element existence into array

check-element.sh

#!/bin/bash

function check_v
{
  local v k="$1"
  shift
  for v; do [[ "$v" == "$k" ]] &&
    return 0;
  done
  return 1
}

function main
{
  local element="$1"
  array=("slayer" "krisiun" "celtic frost" "venom")
  check_v "$element" "${array[@]}"
  echo $?
}

main "$1"
#EOF

set -x

$ bash check-element.sh slayer
+ main slayer
+ local element=slayer
+ array=("slayer" "krisiun" "celtic frost" "venom")
+ check_v slayer slayer krisiun 'celtic frost' venom
+ local v k=slayer
+ shift
+ for v in "$@"
+ [[ slayer == \s\l\a\y\e\r ]]
+ return 0
+ echo 0
0