merging container arrays

[Vino]

On Saturday, 31 October 2020 at 15:16:22 UTC, Vino wrote:
> Hi All,
>
>    Request your help on the below code, the requirement is that 
> result's are stored in one single container.
>
> Code:
> import asdf;
> import std.algorithm: map;
> import std.container.array;
> import std.stdio: writeln;
> import std.typecons: Tuple, tuple;
> import std.range: lockstep;
>
> auto api1()
> {
>  string apidata1 = `{"items": [
>         {"name":"T01","hostname":"test01","pool":"Development"},
>         {"name":"T02","hostname":"test02","pool":"Quality"},
>         {"name":"T03","hostname":"test03","pool":"Production"}
>   ]}`;
>
>  Array!(Tuple!(string, string, string)) data1 = 
> parseJson(apidata1)["items"].byElement
>                              .map!(item => tuple(
>                                                  
> item["name"].get!string("default"),
>                                                  
> item["hostname"].get!string("default"),
>                                                  
> item["pool"].get!string("default")
>                                                  ));
>  return data1[];
> }
>
> auto api2()
> {
>  string apidata2 = `{"items": [
>     {"hostname":"test01","type":"Development"},
>     {"hostname":"test02","type":"Quality"},
>     {"hostname":"test03","type":"Production"}
>   ]}`;
>
>  Array!(Tuple!(string, string)) data2 = 
> parseJson(apidata2)["items"].byElement
>                              .map!(item => tuple(
>                                                  
> item["hostname"].get!string("default"),
>                                                  
> item["type"].get!string("default")
>                                          ));
>  return data2[];
> }
>
> auto api3()
> {
>  string apidata3 = `{"items": [
>     {"type":"Development","location":"L1"},
>     {"type":"Quality","location":"L2"},
>     {"type":"Production","location":"L3"}
>   ]}`;
>
>  Array!(Tuple!(string, string)) data3 = 
> parseJson(apidata3)["items"].byElement
>                                 .map!(item => tuple(
>                                                     
> item["type"].get!string("default"),
>                                                     
> item["location"].get!string("default")
>                                          ));
>  return data3[];
> }
>
>
>
> void main()
> {
>  auto apidata1 = api1;
>  auto apidata2 = api2;
>  auto apidata3 = api3;
>  if(!apidata1.empty) {
>     foreach(ref x , y; lockstep(apidata1[], apidata2[])) {
>        if(x[1] == y[0]){
>           writeln(y[1]);  // the output needs to be merged with 
> apidata1
>        }
>     }
>  }
>  if(!apidata2.empty) {
>     foreach(ref x, y; lockstep(apidata2[], apidata3[])) {
>        if(x[1] == y[0]) {
>           writeln(y[1]); // the output needs to be merged with 
> apidata1
>        }
>     }
>  }
>  writeln(apidata1[]); // Should 
> contain(name,hostname,pool,type,location)
> }
>
> From,
> Vino.B

Hi All,

    I was able to find a solution using a different approach, the 
code is in the link
https://run.dlang.io/is/Jx4NLw, request your help on to get the 
value using the Key

In PHP we can get the value of the associative array using the 
key as below

PHP:
foreach($array as $k) { print_r($k["Name"]); }

So request you help on how the same in d

Tired the below , no luck

1 > foreach(i; data.byKey) { writeln(i["Name"]); }

Error:
onlineapp.d(53,37): Error: cannot implicitly convert expression 
`"Name"` of type `string` to `ulong`

2 > foreach (ref i; data) writeln(i["Name"]);
3 > foreach(i; data.byValue) { writeln(i["Name"]); }
4 > foreach(i; data) { writeln(get(i["Name"])); }

Error:
onlineapp.d(53,38): Error: function 
`std.container.array.Array!string.Array.opIndex(ulong i) inout` 
is not callable using argument types `(string)`
onlineapp.d(53,38):        cannot pass argument `"Name"` of type 
`string` to parameter `ulong i`

From,
Vino.B