Merge Dictionaries

Question

I have multiple dictionaries, each with a unique key, value pair. I would like to merge these dictionaries into a single dictionary. Any suggestions on how to accomplish this would be appreciated.

Mike Schmitt · Answer

You probably need to look into the CDT Manipulation plug-in, which has the "JoinCdts()" rule, which based on the limited detail you've provided, i'm guessing is your closest bet. 
 
Also, AFAIK a!flatten() doesn't handle this use case - it is more for creating a single flat array of results when using looping functions might return arrays of arrays which can be confusing to deal with.

Philip Snyman · Answer

Hi Mike, 
 Thanks. I have in the meantime however come up with a solution that doesn't require any additional plugins. See below: 
 with(
 local!dictionary: cast('type!{http://www.appian.com/ae/types/2009}Dictionary', {}),
 local!fields: {"field1", "field2"},
 local!values: {"value1", "value2"},
 reduce(
 fn!insert(_, _, _),
 local!dictionary,
 merge(
 local!values,
 local!fields
 )
 )
) 
 Kind Regards, 
 Philip Snyman 
 I Am App South Africa

swapnac · Answer

I think you can create new Dictionary by passing this existing dictionary using foreach() or apply

danielh0002 · Answer

I've accomplished this effectively using these three expression rules: extractKeysFromDictionary: a!forEach(
 items: xpathsnippet(toxml(ri!dictionary), "/*/*"),
 expression: index(split(index(split(fv!item, " "), 1), "<"), 2)
) extractValuesFromDictionary: a!forEach(
 items: rule!extractKeysFromDictionary(ri!dictionary),
 expression: property(ri!dictionary, fv!item)
) combineDictionaries: reduce(
 fn!insert,
 ri!dictionary1,
 merge(
 rule!extractValuesFromDictionary(ri!dictionary2),
 rule!extractKeysFromDictionary(ri!dictionary2)
 )
)

GouthamKrishna · Answer

Perfect !

Merge Dictionaries

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