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kotlinlang

Hi :slightly_smiling_face:
```import com.fasterxml.jackson.annotation.JsonProperty
import com.fasterxml.jackson.module.kotlin.readValue

data class InsideList(
    @JsonProperty("price") val price: String,
    @JsonProperty("product") val product: String
)

data class NList(
    @JsonProperty("listexample") val listexample: List&lt;InsideList&gt;?
)```
the `response` is the json list
```val jsonResponse = MapperUtility.jsonMapper.readValue&lt;NList&gt;(response)

println("Response : {${jsonResponse.listexample}}")```
the print is:
`NList(listexample=[InsideList(product=apple, price=ten)])`
how can i print just the value of the product?
i tried to do it with `forEach` but not works as expected :face_with_rolling_eyes:

what you're looking for is the `map` function (or it's various alternatives) - it allows you to transform a list to a new one, by applying a function to each element:
```val prices: List&lt;String&gt;? = jsonResponse.listexample?.map { it.price }```

Nicee now i know there is something like that 10x :+1: