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

briank538 over 8 years ago

I'd like to at run time add new name value pair to a dictionary. Is this possible?

Thanks.

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Stefan Helzle over 4 years ago in reply to paulg0001 +2
A Score Level 3

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…

0 Nagashankar Nallavalli over 8 years ago

@ briank please find the below link forum.appian.com/.../Expressions.html
hope this is helpful to you
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0 Shashank over 8 years ago

@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
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0 Shashank over 8 years ago

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
)
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0 Stefan Helzle
A Score Level 3
over 8 years ago

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.
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0 kondetiv over 8 years ago

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"}),
}

)
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0 kondetiv over 8 years ago

output for the above code :-

type List of Dictionary
2 items
Value
[label:firstName,value:kondeti]; [label:lastName,value:venkat]
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0 kondetiv over 8 years ago

sorry misunderstood !
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0 Shashank over 8 years ago

@stefanh , Thanks a lot for your valuable input , I have updated the above code with your snippet . It worked like a charm !!
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0 Shashank over 8 years ago

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
)
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0 Stefan Helzle
A Score Level 3
over 8 years ago

You are welcome :-)
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Is there a way to *dynamically* add a new element to a dictionary?

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