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Last week I worked on entering a subnet, this is used for condition, match, filter, map etc.. See description under video. (no audio)
<https://youtu.be/hWzxG2oeu0E>

I couldn't understand at all what happened in this video.

I believe they wrote the program "`if global-&gt;frame = 15 then "Alice" else "42`

they instantiated a predicate object, then showed creating subprograms that here were called "subnet"s for each half of the if, one subgraph produced "15" and the other "Alice"

Thanks Stew, that's about it. Note that one subgraph produces 42 the integer and the other "Alice" the string, the result is then of type &lt;int | string&gt;, a variant type of either type. One could also write this as an expression: `global-&gt;frame = 15 ? "Alice" : 42` and wrap/unwrap from one to the other.