Note that
%hash = { ... };
should be
%hash = ( ... );
The curlies create an anonymous hash and return a reference to that hash. However, when you assign to a hash, you want to assign a list of key/values, not a reference to another hash. svenXY silently fixed this in his reply, but I thought it was worth mentioning.

In reply to Re: how to assign a hash to a file by ikegami
in thread how to assign a hash to a file by s_gaurav1091

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