TryCF Gist

trycf-gist-1716465501022-0f6f1a93-12d4-ae1b-f2db-4016ed8d4449.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;

assert( original.keyExists( "z" ), false );
assert( original.a, 100 );
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>