I used one dataset as a hash, with "ID" as its key. I also have other variables in the hash that I want to keep and I included them in defineData.
I'd like to output variables in the hash, where the "ID" can not be found in the main dataset, because I'm more interested in variables that dont exist in the main dataset.
The codes I'm using now are like this: if hash.find()^=o then output .... But it seems like it outputs variables in the main datasets instead of in the hash.
I can't do it by reversing the hash and main dataset, because the main dataset is far larger than my hash. What code should I use to solve it? Any help will be appreciated!
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