Concatenate Listview into Flutter

Question

I’m trying to display a received list on Json, but I need to concatenate it for better visualization...

First case - No concatenation

Text(promocoes[index].descrprod)

Second case - With concatenation

Text('cód : $promocoes[index].codprod' )

In the second case returns me the following

Instance Of

What is the correct way to concatenate a text?

Answer 1

To concatenate a "simple" variable we do as follows:

String nome = "Matheus";
String meuTexto = "Meu nome é $nome";

To concatenate properties of a class for example, we do it as follows

class NomeCompleto{
  String nome = "Matheus";
  String sobrenome = "Ribeiro";
}

NomeCompleto meuNomeCompleto = NomeCompleto();
String meuTexto = "Meu nome é ${meuNomeCompleto.nome}";

Answer 2

This question is practically the same as yours, basically you should use the { key so that the compiler can identify what you really want.

In your case I’d be:

Text('cód : ${promocoes[index].codprod}')