2021年3月1日(月) 18:37 felix <fe...@f-hauri.ch>: > $ unset map["$key"] > Linux
This is a topic that is often discussed on this mailing list, and I think the conclusion is that we should always write it as $ unset 'map[$key]' In addition to the extra expansions of the array subscripts, `unset map["$key"]' has another problem. For example, when there is a file named `mapf', it will be expanded to `unset mapf'. When there are no matching filenames but `shopt -s failglob/nullglob' is set, it will also result in unexpected behavior. You can also see https://mywiki.wooledge.org/BashPitfalls#unset_a.5B0.5D -- Koichi
