Filter and sort associative array

Head Scratcher filter at
Fri Jan 11 16:02:27 UTC 2019

Thank you. This works great. What I don't understand is how a 
key-value pair ends up being a set of strings. Where did the 
value of the key-value pair get removed?  According to the 
library documentation, the array function "allocates an array and 
initializes it with copies of the elements of range r." So 
wouldn't the resulting array contain pairs? And if so, how does 
the sort work on pairs?

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