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kotlinlang

Given a java class with a setter taking a non-nullable value, and kotlin extension function with a nullable parameter, what's idiomatic way to call the setter if the param is non-null?
```
fun MyPojo.init(fieldName: String? = null) {
            fieldName?.let(::setFieldName)
            fieldName?.also { setFieldName(it) }
            fieldName?.also { this.fieldName = it }
            if(fieldName != null) setFieldName(fieldName)
            if(fieldName != null) this.fieldName = fieldName
}```

Not sure Kotlin is opinionated enough for any of them to be ideomatic. I would prefer either because of autocasting
```
fieldName?.also(::setFieldName)
fieldName?.also { setFieldName(it) }
```

in the case of `fieldName?.also { setFieldName(it) }` is it not better to use the property syntax?

Missed that. Yes that would probably be more ideomatic

Personally, I find `if(fieldName != null) this.fieldName = fieldName` to be the solution that's easiest to understand at a glance. I mostly use `let` and `also` as part of longer chains as otherwise I don't always see an advantage in using them.