TryCF Gist

trycf-gist-1716466111417-4ec9b9ae-02fa-dc4c-614e-55e92a82f503.cfm

<cfscript>
	function assert( actual, expected ) {
		if ( expected == actual ) {
			writeOutput( "✔" )
		} else {
			writeOutput( "✗" )
		}
		writeOutput( " expected `#expected#`, got `#actual#`<br>" );
	}

	original = {
		"a": 10,
		"b": [
			20,30
		],
		"c": [
			{ "d": 40 }
		]
	}

	dup = duplicate( original );
	dup.z = 50;

	// mutate the original
	original.a = 100;
	original.b.append(400);
	original.c[ 1 ].d = 500;
	original.c[ 1 ].e = 600;
	dup.y = 50;

	assert( original.keyExists( "z" ), false );
	assert( original.a, 100 );
	assert( dup.keyExists( "y" ), false );
	assert( dup.a, 10 );
	assert( original.b.len(), 3 );
	assert( dup.b.len(), 2 );
	assert( original.c[ 1 ].d, 500 );
	assert( original.c[ 1 ].e, 600 );
	assert( dup.c[ 1 ].d, 40 );
	assert( dup.c[ 1 ].keyExists("e"), false );
</cfscript>