are the two command equivalent?

Not even slightly, as the latter is illegal syntax: 

perl -mstrict -cwle"$Array[ $i ]{ newKey }->'newValue'"

String found where operator expected at -e line 1, near "->'newValue'"
        (Missing operator before 'newValue'?)
syntax error at -e line 1, near "->'newValue'"
-e had compilation errors.

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In reply to Re^5: share array of hashes between main program and thread by BrowserUk
in thread share array of hashes between main program and thread by Adler

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