tyrion | Plugin library

You can use correlated sub-queries and check whether the id column is a substring of the brothers or sisters and then use LISTAGG to aggregate the matched names.

Assuming that you want the name to be in the same order as the id are in the brothers or sisters lists then you could use:

if (result = "Droids") This does not check, it assigns. You want to use ==.

You don't want to return from inside the forEach method. You need to assign the result and return that result after processing the records.

Be sure to compare the item to the string value you're looking for.

solution

Explanation

This is because if a node is already a part of a document, then you cannot use that node reference again in another part of a document. If you do then the previous nodes get removed and inserted into new location.

The variable dataset holds an object. You have to call flatMap on dataset.PFA.Entity.

Use COUNT as an analytic function:

Just loop over the array and do the comparison

1. What you have defined can be called an "intrusive" data structure, because you store the hierarchy data (children) along with the payload (tag) in each tree instance. There is hardly any "canonical" way of defining such a structure - the definition usually depends on the requirements. Some textbooks and open libraries may define tress exactly in this way, some code may provide a custom memory allocators to keep allocated nodes close to each other in memory.

Considering other options, it is preferred to separate node payload and actual hierarchy data. For example, if your tree is only a (complete) binary tree, you can get away with storing node's left/right sibling indices in an array and avoid allocations/pointers altogether. If you need k-ary trees without too much node insertions/deletions, you can look at the LCRS tree representation to represent hierarchy and store all the data associated to node (tags and whatever else) in a separate location.

There is my answer to a seemingly similar question about a simpler data structure. You may take a look at it.

That said, you representation (given the absence of bugs and a correct recursive cleanup routine) is a valid tree representation in C.

1. In C you have an option to lock everything down or apply something like a Copy-on-Write strategy while modifying your trees. It all depends on requirements, once again. Do you have to search the tree, do you frequently update the structure or only recalculate/reassign node data ? Do you process this data locally using CPUs only or you need to share the tree with GPU/DSP or transfer it over the network ? These questions may help you to select the representation and synchronization primitives required. Otherwise, there is no "standard" way to "make everything thread-safe/immutable" once and use all the time. One suggestion I may have is when using the LCRS, you can program in a "functional way" and "calculate" the new hierarchy array from an old one each time you need to modify the tree structure.

This seems to be a connectivity issue. I looked at the file and it's a 16k file yet you downloaded only 1,420 bytes so you got an error. I'm guessing that the link is redirecting and we get an HTML error page which is what you see.

It's also possible that this failed to you once and you're now still looking at the cached failed download.

The downloaded file should be in your .cn1 directory (assuming this is on the simulator) under the name "tyrion". First try to just delete it.

If this doesn't help look at it's contents, it could be an HTML error file.

Because in JS let variables are scoped to its nearest function. In this case result is only available at droids level. Making the variable global should work: