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Worse than single letters
(lemmy.world)
Post funny things about programming here! (Or just rant about your favourite programming language.)
Length might have mattered in the 80s and 90s when IDEs were crap but we got autocomplete in pretty much all our text editors (even TUI ones like vim).
As for readability there is an argument to be had in specific contexts, but 9 out of 10 times it makes more sense to use a proper word.
Example:
In this case using
item
in the place ofi
would be more fitting.