Add a variable to a class instance at runtime: Difference between revisions

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=={{header|JavaScript}}==
=={{header|JavaScript}}==
This kind of thing is fundamental to JavaScript, as it's a prototype-based language rather than a class-based one.
e = {} // generic object
<lang javascript> e = {} // generic object
e.foo = 1
e.foo = 1</lang>


=={{header|Perl}}==
=={{header|Perl}}==