dokuzbir
How to convert list to string without losing brackets
Hello,
I am trying to convert my lists to string without losing brackets.For start i have 3 map. They look like these
buyer = %{
id: “BY789”,
name: “Micheal”,
surname: “test”,
}
address =%{
contactName: "test tes ",
city: “test”,
country: “test”,
address: “test”,
}
item = %{
id: “BI101”,
category: “test”,
Type: “PHYSICAL”,
price: “0.3”
}
I want to convert them to like that
“[buyer=[id=BY789,name=Micheal, surname=test],address=[contactName=test,**
city=test,country=test,address=test],item=[id=BI101,category=test,Type=PHYSICAL, price=0.3]]”
i tried that but it is not like what i want.
Pre_string = for map ← [buyer,address, item] do
to_string(Enum.map(map, fn {k, v} → “#{k}=#{v},” end)
end
Enum.chunk_every(Pre_string, 1)
result is that
[ [“id=BY789,name=Micheal, surname=test”, “contactName=test],
[city=test,country=test,address=test”], [“id=BI101,category=test,Type=PHYSICAL, price=0.3”]]
My problem is losing map titles and when i convert that to string losing brackets
Marked As Solved
peerreynders
defmodule Demo do
defp to_string_(%{} = m) do
m
|> Map.to_list()
|> to_string_()
end
defp to_string_(l) when is_list(l) do
values =
l
|> Enum.map(&to_string_/1)
|> Enum.join(",")
"[#{values}]"
end
defp to_string_({k,v}) when is_atom(k) do
"#{Atom.to_string(k)}=#{to_string_(v)}"
end
defp to_string_(s) when is_binary(s) do
s
end
def convert(l) when is_list(l) do
to_string_(l)
end
end
buyer = %{
id: "BY789",
name: "Micheal",
surname: "test"
}
address = %{
contactName: "test tes ",
city: "test",
country: "test",
address: "test"
}
item = %{
id: "BI101",
category: "test",
type: "PHYSICAL",
price: "0.3"
}
IO.inspect(
Demo.convert([buyer: buyer, address: address, item: item])
)
$ elixir demo.exs
"[buyer=[id=BY789,name=Micheal,surname=test],address=[address=test,city=test,contactName=test tes ,country=test],item=[category=test,id=BI101,price=0.3,type=PHYSICAL]]"
Also Liked
peerreynders
But do you understand how it works … ?
The code is worthless - understanding is priceless.
Schultzer
use Kernel.inspect like
iex> "#{inspect ["abc", 1, 3.14, %{}, {}]}"
"[\"abc\", 1, 3.14, %{}, {}]"
Schultzer
But those are just escaped chars.? you could always convert it to a list then they won’t show.
NobbZ
They are not actually there… Please read about escaping strings in programming, the concept is universal.
dokuzbir
thanks for interesting approach but now i have trouble with backslashes. 
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