var 

ape = new Q.ComplexNumber(),

bee = new Q.ComplexNumber( 1 ),

elk = new Q.ComplexNumber( 1, 2 ),

fox = new Q.ComplexNumber( elk )

​

ape.toText()//  Returns '0'

bee.toText()//  Returns '1'

elk.toText()//  Returns '1 + 2i'

fox.toText()//  Returns '1 + 2i'

​

elk.isEqualTo( fox )   //  Returns true

elk.index === fox.index//  Returns false