> I know where to find all the initializations and comments about the identifiers

With good variable names, no comments are needed. And there shouldn't be a block larger than one screen, so you don't have to scroll to find the initialization. See Skimmable Code by schwern.

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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In reply to Re^2: How to Check Hashes for Missing Items when Keys can be Values and vice versa by choroba
in thread How to Check Hashes for Missing Items when Keys can be Values and vice versa by ozboomer

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