import std.stdio;
 
void main() {
 
	auto a = [1, 2, 3];
	auto b = a.dup;
 
	b[] *= 2;
	writeln("a = ", a); // [1, 2, 3] // OK
	writeln("b = ", b); // [2, 4, 6] // OK
 
 
	auto c = [[[1, 2, 3], [4, 5, 6, 7, 8]],
		  [[9, 10], [11, 12, 13]]];
 
	auto d = c.dup;
 
	writeln("d[0][1][1 .. $ - 1] = ",
		 d[0][1][1 .. $ - 1]);
 
	d[0][1][1 .. $ - 1] *= 3;
 
	writeln("c = ", c);
	// [[[1, 2, 3], [4, 15, 18, 21, 8]],
	//  [[9, 10], [11, 12, 13]]] // wrong
	writeln("d = ", d);
	// [[[1, 2, 3], [4, 15, 18, 21, 8]],
	//  [[9, 10], [11, 12, 13]]] // OK
}
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		a = [1, 2, 3]
b = [2, 4, 6]
d[0][1][1 .. $ - 1] = [5, 6, 7]
c = [[[1, 2, 3], [4, 15, 18, 21, 8]], [[9, 10], [11, 12, 13]]]
d = [[[1, 2, 3], [4, 15, 18, 21, 8]], [[9, 10], [11, 12, 13]]]