Re^6: How could I check if a variable is 'read-only'?

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readonly: no
Modification of a read-only value attempted at - line 9.
# Successfully installed JSON-4.02 (upgraded from 2.97001)
readonly: no
Modification of a read-only value attempted at - line 8.
# Scalar::Util is up to date. (1.50)
perl -MScalar::Util=readonly -MJSON -E 'say readonly(JSON::false) ? "r
+eadonly" : "ReAdOnLY"'
ReAdOnLY
# This is perl 5, version 18, subversion 4 (v5.18.4)
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Re^7: How could I check if a variable is 'read-only'? by choroba (Cardinal) on Jun 15, 2019 at 20:00 UTC
Also note that JSON is just a proxy to several possible JSON modules: JSON::XS, JSON::PP, or JSON::backportPP (or Cpanel::JSON::XS, but you have to demand it explicitly). `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l]