I am having difficulty dynamically displaying the contents of variables. For example:
minha_var_1 = %{Um texto}
minha_var_2 = %{Outro texto}
minha_var_3 = %{Mais outro texto}
But, I tried to display both with:
for i in(0..2)
puts minha_var_"#{i}"
end
How to:
for i in(0..2)
puts "minha_var_#{i}"
end
Unsuccessful.
What would be the right way to display this content dynamically?
If you really want to access multiple variables in a loop, the language allows this. You can use the dangerous eval function, which takes as argument a code in the format of a string and executes it. Thus eval("1+1") results in 2 and eval("system 'shutdown now'") turns off your computer. So you can access your variables using eval("minha_var_1") or eval("minha_var_2") . It's a matter of building the right string and moving to eval .
minha_var_1 = "Um texto"
minha_var_2 = "Outro texto"
minha_var_3 = "Mais outro texto"
for i in 1..3
puts eval("minha_var_#{i}")
end
But, of course, there is no conceivable reason for you wanting to use such a code. Use arrays or a hash for this task:
Using Array:
minha_array = ["Um texto", "Outro texto", "Mais outro texto"]
for i in 0..2 # note que arrays contam a partir do zero
puts minha_array[i]
end
Using Hash:
meu_hash = {
1 => "Um texto",
2 => "Outro texto"
3 => "Mais outro texto"
}
for i in 1..3
puts minha_array[i]
end
Preference solution using arrays:
#criando o array de strings
minha_var = [%{Um texto}, %{Outro texto}, %{Mais outro texto}]
#exibindo o array com laço for
for i in(0..2)
puts minha_var[i]
end
But I did not find a solution without the use of arrays ...