Hi All,

   Request your help on how to remove duplicates in JSON.

Code:
import asdf;
import std.algorithm : map, filter, uniq;
import std.container.array;
import std.stdio : writeln;
import std.typecons : Tuple, tuple;
import std.array;

void main() {
string apidata = `{
"items":
  [
    { "name":"DEV", "Configuration":{"type":"D1"} },
    { "name":"DEV" },
    { "name":"DEV", "Configuration":{"type":"D1"} },
    { "name":"QAS", "Configuration":{"type":"Q1"} },
    { "name":"QAS", "Configuration":{"type":"Q1"} },
    { "name":"QAS" },
    { "name":"PRD", "Configuration":{"type":"P1"} },
    { "name":"PRD", "Configuration":{"type":"P1"} },
    { "name":"PRD" }
  ]
}`;

Array!(Tuple!(string, string)) data =
          parseJson(apidata)["items"]
          .byElement
          .map!(item => tuple(
                item["name"].get!string("default"),
                item["Configuration","type"].get!string("default")
            ));

    writeln(data[]);
}

Output: The above code produces the below output

[
 Tuple!(string, string)("DEV", "D1"),
 Tuple!(string, string)("DEV", "default"),
 Tuple!(string, string)("DEV", "D1"),
 Tuple!(string, string)("QAS", "Q1"),
 Tuple!(string, string)("QAS", "Q1"),
 Tuple!(string, string)("QAS", "default"),
 Tuple!(string, string)("PRD", "P1"),
 Tuple!(string, string)("PRD", "P1"),
 Tuple!(string, string)("PRD", "default")
]

Required Output
[
 Tuple!(string, string)("DEV", "D1"),
 Tuple!(string, string)("QAS", "Q1"),
 Tuple!(string, string)("PRD", "P1"),
]

From,
Vino.B

On Sunday, 1 November 2020 at 09:14:35 UTC, Vino wrote:
> [
>  Tuple!(string, string)("DEV", "D1"),
>  Tuple!(string, string)("DEV", "default"),
>  Tuple!(string, string)("DEV", "D1"),
>  Tuple!(string, string)("QAS", "Q1"),
>  Tuple!(string, string)("QAS", "Q1"),
>  Tuple!(string, string)("QAS", "default"),
>  Tuple!(string, string)("PRD", "P1"),
>  Tuple!(string, string)("PRD", "P1"),
>  Tuple!(string, string)("PRD", "default")
> ]
>
> Required Output
> [
>  Tuple!(string, string)("DEV", "D1"),
>  Tuple!(string, string)("QAS", "Q1"),
>  Tuple!(string, string)("PRD", "P1"),
> ]
>
> From,
> Vino.B

I can only test with Phobos (no asdf on run.dlang.io), but isn't just normal sort and uniq what you want?

data[]
    .array
    .sort
    .uniq!((tup1, tup2) => tup1[0] == tup2[0]);

https://run.dlang.io/is/a3KHaE

Sorting "default" values can be tricky but they conveniently cede to explicit D1/Q1/P1 values because of ASCII. Otherwise you would have to provide different sort and uniq predicates.

On Sunday, 1 November 2020 at 13:31:19 UTC, Anonymouse wrote:
> On Sunday, 1 November 2020 at 09:14:35 UTC, Vino wrote:
>> [...]
>
> I can only test with Phobos (no asdf on run.dlang.io), but isn't just normal sort and uniq what you want?
>
> data[]
>     .array
>     .sort
>     .uniq!((tup1, tup2) => tup1[0] == tup2[0]);
>
> https://run.dlang.io/is/a3KHaE
>
> Sorting "default" values can be tricky but they conveniently cede to explicit D1/Q1/P1 values because of ASCII. Otherwise you would have to provide different sort and uniq predicates.

Tip:
You can find asdf under "Add library" on run.dlang.io