Map with variable key

RE: Map with variable key

ChamindaF — Thu, 08 Feb 2024 02:51:41 GMT

Hi,

I know its late ... This also works ,

a!localVariables(
local!keys: { "keyOne", "keyTwo", "keyThree" },
local!values: { 117, "Appian", now() },

a!update(
data: a!map(),
index: local!keys,
value: local!values
)

)

output :

Map
- keyOne117(Number (Integer))
- keyTwo"Appian"(Text)
- keyThree2/8/2024 2:46 AM GMT+00:00(Date and Time)

RE: Map with variable key

Alex Boerescu — Thu, 28 Sep 2023 17:36:24 GMT

Hi, I know it's late, but I thought it'd be good to capture the response here.

You could use reduce with merge to achieve the desired outcome - not sure if all functions were available at the time you asked.

a!localVariables(
  local!keys: { "keyOne", "keyTwo", "keyThree" },
  local!values: { 117, "Appian", now() },
  reduce(
    a!update,
    a!map(),
    merge(local!keys, local!values)
  )
)

Kudos to Dionne OBrien for the coming up with the solution!

RE: Map with variable key

Marco — Tue, 15 Feb 2022 22:38:57 GMT

Works perfectly. Thanks!

RE: Map with variable key

Marco — Tue, 15 Feb 2022 22:38:30 GMT

Yeah, that's what I was referring to

RE: Map with variable key

ajhick — Tue, 15 Feb 2022 22:18:42 GMT

Ooohhh. Yeah, I've never used or seen that either.

RE: Map with variable key

Mike Schmitt — Tue, 15 Feb 2022 22:15:32 GMT

I take that back - i think Marco is referring to the "Attributes" functionality provided within Group Types (which I've never used or seen used anywhere), but where the attributes of which are totally arbitrary.

RE: Map with variable key

ajhick — Tue, 15 Feb 2022 22:09:32 GMT

Let me know how you go. But I would agree with Mike above. The solution I've proposed is only needed if the keys are unknown and attributes of groups is a known thing. Unless I'm misunderstanding your use case I don't believe my solution is required.

RE: Map with variable key

Marco — Tue, 15 Feb 2022 22:05:09 GMT

That at least LOOKS like what I need. Gonna have to try it out to know for sure!

RE: Map with variable key

ajhick — Tue, 15 Feb 2022 22:00:10 GMT

Hi Marco,

The only way I've found of doing this is utilising JSON. Is below sort of what you're looking for?

a!localVariables(
  local!keys: {
    "keyOne",
    "keyTwo",
    "keyThree"
  },
  local!values: {
    117,
    "Appian",
    now()
  },
  local!keysAsJson: concat(
    "{",
    a!forEach(
      items: local!keys,
      expression: concat(
        char(34),
        fv!item,
        char(34),
        ":",
        char(34),
        char(34),
        if(
          fv!isLast,
          {},
          ","
        )
      )
    ),
    "}"
  ),
  local!keysAsDictionary: a!fromJson(local!keysAsJson),
  reduce(
    a!update,
    local!keysAsDictionary,
    merge(
      local!keys,
      local!values
    )
  )
)

RE: Map with variable key

Marco — Tue, 15 Feb 2022 21:42:26 GMT

I was wanting to use a!setGroupAttributes to make an interface that sets attributes on groups. The function requires a dictionary of attributes to set them and ideally I'd like the interface to allow one to set both the attribute names and values.

RE: Map with variable key

Chris — Tue, 15 Feb 2022 21:37:22 GMT

AFAIK there isn't any way to define the key within a!map() dynamically like this. This sounds like a situation I would utilize the database to maintain dynamically defined key-value pairs, where the user can enter both and you can reference them where you need via a!queryEntity().

What is the use case?