json
: add error for empty key and update usage text
#2167
Merged
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Outputs an error when there is an empty key in the first object, since the column with an empty key is not represented in the output. Also adds a note about not recommending usage for objects with duplicate keys, which in the future could be turned into an error when there are duplicate keys.
See both of the below images for examples.
Example 1
Example 2