The result of this expression is an array, not a hash. So now we need to combine the values from the keys and produce a hash. The expression is starting to get long (esp. compared with how map and grep look for arrays).

A lot of transformations want me to keep things as hashes. I'd describe most data structures in perl as being multi-level hashes, with a smattering of arrays, not vice versa.

In reply to Re^2: map and grep (but for hashes) by zerohero
in thread map and grep (but for hashes) by zerohero

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