Hashmaps in Bash

Use the declare keyword in bash to create a hashmap in bash.

declare -A hashmap
hashmap["key"]="value"
hashmap["key2"]="value2"
echo "${hashmap["key"]}"
for key in ${!hashmap[@]}; do
    echo $key;
done
for value in ${hashmap[@]}; do
    echo $value;
done
echo hashmap has ${#hashmap[@]} elements

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Hashmaps in Bash