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Task/String-prepend/Perl-6/string-prepend.pl6

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+# explicit concatentation
+$_ = 'byte';
+$_ = 'kilo' ~ $_;
+.say;
+
+# interpolation as concatenation
+$_ = 'buck';
+$_ = "mega$_";
+.say;
+
+# lvalue substr
+$_ = 'bit';
+substr-rw($_,0,0) = 'nano';
+.say;
+
+# regex substitution
+$_ = 'fortnight';
+s[^] = 'micro';
+.say;
+
+# reversed append assignment
+$_ = 'cooper';
+$_ [R~]= 'mini';
+.say;