Associative arrays in Shell scripts

To add to Irfan’s answer, here is a shorter and faster version of get() since it requires no iteration over the map contents:

get() {
    mapName=$1; key=$2

    map=${!mapName}
    value="$(echo $map |sed -e "s/.*--${key}=\([^ ]*\).*/\1/" -e 's/:SP:/ /g' )"
}

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