Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

Stefan Helzle — Thu, 27 Aug 2020 14:29:23 GMT

You are welcome :-)

RE: Is there a way to dynamically add a new element to a dictionary?

paulg0001 — Thu, 27 Aug 2020 13:47:51 GMT

Wow Stefan, you never cease to amaze. Thank you for helping with this. As for the update, I am not an Administrator of our Appian systems. Things move slowly around here. Lots of red tape required but I will begin the process of requesting the update. For example: first qtr '20, upgraded from 18.2 to 19.4 (current). Grateful for 19.4. Thankful for your help, Sir.

RE: Is there a way to dynamically add a new element to a dictionary?

Stefan Helzle — Thu, 27 Aug 2020 06:24:41 GMT

Why is an update no option? The new version includes to old functions as well.

This is a quick solution. I am pretty sure there is a better one.

a!localVariables(
  local!values: {{ id:1, name:"alpha" },{ id:2, name:"bravo" },{ id:3, name:"charlie" }},
  reduce(
    updatecdt(_,_),
    cast(type!Dictionary, {}),
    a!forEach(
      items: local!values,
      expression: a!fromJson(
        substitute(
          a!toJson({tzqYx62_01_: fv!item.name}),
          "tzqYx62_01_",
          fv!item.id
        )
      )
    )
  )
)

RE: Is there a way to dynamically add a new element to a dictionary?

paulg0001 — Wed, 26 Aug 2020 16:12:59 GMT

Stefan, that would be wonderful, but I do not have the option to update to the new versions of the Dictionary Manipulation plugin. Is it possible to accomplish the same with your previous updatecdt / fromJson / toJson approach?

There was another post where a contributor suggested incorporating reduce() with your recipe for updatecdt() but I do not know how to work in the correct syntax to accomplish the desired outcome.

RE: Is there a way to dynamically add a new element to a dictionary?

Stefan Helzle — Wed, 26 Aug 2020 15:04:16 GMT

Update to the new versions of the Dictionary Manipulation plugin and use the code below

a!localVariables(
  local!values: {{ id:1, name:"alpha" },{ id:2, name:"bravo" },{ id:3, name:"charlie" }},
  createdictionary(
    local!values.id,
    local!values.name
  )
)

RE: Is there a way to dynamically add a new element to a dictionary?

paulg0001 — Wed, 26 Aug 2020 14:12:17 GMT

Stefan, I've executed Shashanks code and it works great. Thank you for your contributions.

How would you incorporate this approach within a foreach() where items is a list of dictionary and local!test output contains custom key:value pairs derived from each dictionary in the list?

Ex: local!dictionaries: {{ id:1, name:"alpha" },{ id:2, name:"bravo" }.{ id:3, name:"charlie" }}

local!test output: { alpha:1, bravo:2, charlie:3 }

with(
  local!test: {
    {
      id: 1,
      name: "test"
    }
  },
  local!newKeyValPair: a!fromJson(
    substitute(
      a!toJson(
        {
          tzqYx62_01_: ri!value
        }
      ),
      "tzqYx62_01_",
      ri!key
    )
  ),
  local!updated: updatecdt(
    local!test,
    local!newKeyValPair
  ),
  local!updated
)

RE: Is there a way to dynamically add a new element to a dictionary?

warner jonn — Tue, 07 Jul 2020 06:08:46 GMT

try this to dictionary

dictionary = {x: [] for x in names}

RE: Is there a way to dynamically add a new element to a dictionary?

Shashank — Sun, 09 Oct 2016 13:41:28 GMT

@briank .. No worries .. Glad that it was helpful !!

RE: Is there a way to dynamically add a new element to a dictionary?

briank538 — Sat, 08 Oct 2016 18:44:34 GMT

Thanks everyone. Shashankb/Stefanh791, your solution worked like a charm.

RE: Is there a way to dynamically add a new element to a dictionary?

Stefan Helzle — Sat, 08 Oct 2016 15:05:46 GMT

You are welcome :-)

RE: Is there a way to dynamically add a new element to a dictionary?

Shashank — Sat, 08 Oct 2016 13:32:41 GMT

with(
local!test: {
{
id: 1,
name: "test"
}
},
local!newKeyValPair: a!fromJson(
substitute(
a!toJson(
{
tzqYx62_01_: ri!value
}
),
"tzqYx62_01_",
ri!key
)
),
local!updated: updatecdt(
local!test,
local!newKeyValPair
),
local!updated
)

RE: Is there a way to dynamically add a new element to a dictionary?

Shashank — Sat, 08 Oct 2016 13:31:52 GMT

@stefanh , Thanks a lot for your valuable input , I have updated the above code with your snippet . It worked like a charm !!

RE: Is there a way to dynamically add a new element to a dictionary?

kondetiv — Sat, 08 Oct 2016 12:13:50 GMT

sorry misunderstood !

RE: Is there a way to dynamically add a new element to a dictionary?

kondetiv — Sat, 08 Oct 2016 11:40:58 GMT

output for the above code :-

type List of Dictionary
2 items
Value
[label:firstName,value:kondeti]; [label:lastName,value:venkat]

RE: Is there a way to dynamically add a new element to a dictionary?

kondetiv — Sat, 08 Oct 2016 11:39:54 GMT

here is the small code snippet i tried. Not sure how far it may be helpful for you.

with(
local!dictionary:{{label:"firstName",value:"kondeti"}},

{
append(local!dictionary,{label:"lastName",value:"venkat"}),
}

)

RE: Is there a way to dynamically add a new element to a dictionary?

Stefan Helzle — Sat, 08 Oct 2016 11:34:29 GMT

The problem is that updatecdt does not allow dynamic field names. But if you add

a!fromJson(substitute(a!toJson({tzqYx62_01_:ri!value}), "tzqYx62_01_", ri!key))

to the above code, even that is possible. It creates a dictionary with a fixed field name and converts it to JSON. Then it replaces the field name in the JSON string to the desired field name and converts it back to an Appian dictionary.

RE: Is there a way to dynamically add a new element to a dictionary?

Shashank — Sat, 08 Oct 2016 11:21:24 GMT

Did a small test , not sure how far it may be helpful , but might be a start :

with(
local!test : {{id : 1, name : "test"}},
local!updated : updatecdt(local!test,{newField : "myNew"}),

local!updated
)

RE: Is there a way to dynamically add a new element to a dictionary?

Shashank — Sat, 08 Oct 2016 11:10:55 GMT

@briank Hi , did you have a chance to look at the following shared component

https://forum.appian.com/suite/tempo/records/item/lMBCLGOdlMUpdGVqW3dQaIKmclBmvvNEj8vu_cjb7T-5YiPr4Fu8ly5Yj1s09uenE4RYzA8zKyx7eiUhu-iLnNiL_yNHr1dalWMFghiqrZpWgaUrg/view/summary

Please have a look at the updatecdt , it might be helpful in adding a new field to your cdt

Thanks

RE: Is there a way to dynamically add a new element to a dictionary?

Nagashankar Nallavalli — Sat, 08 Oct 2016 09:58:48 GMT

@ briank please find the below link forum.appian.com/.../Expressions.html
hope this is helpful to you

Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

RE: Is there a way to *dynamically* add a new element to a dictionary?

Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?

RE: Is there a way to dynamically add a new element to a dictionary?