Creating a unique collection in flow

this is a very short post, that shows one small thing that can be very useful - creating a collection of unique elements in visual workflow

there are now quite a few operators on collections in flow, but none of them are ‘remove duplicates’ or ‘add if new’ or anything like that.

i found a way to do this that requires only a single assignment element - no loops or decisions required

step 1 : remove all instances of (X)
step 2: add (X)


this ensures that your collection will only contain one copy of the element.

maybe there is an easier way, but this works!


Now read this

Infinite Flow

UPDATE - 7-7-15: This will eventually trigger an error, and is a known issue w expected behavior ‘TBD’. See updated post - Infinite Flow Refined. for more details on the error and the infinite flow model It is possible to set up a... Continue →