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kotlinlang

Is there a way to use `List`'s indexOf() of a list of a type on another type, for example I have a list of `Product` and `ProductToOrder` which are quite similar in terms of `id` and `name`, I overrode the`equals()` already but `productsToOrder?.indexOf&lt;Any&gt;(product)` always returns `-1`

I don’t think overriding `equals` is a good idea in this case as you would need to override `equals` and `hashCode` in both classes.
Instead you can write:
```productsToOrder.indexOfFirst {
    it.id == product.id &amp;&amp; it.name == product.name
}```