Why are these different?
julia> first(pairs([10,20,30]))
1 => 10
julia> pairs([10,20,30])[1]
10
first treats it like an iterator but getindex treats it like a key-value map
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Why are these different?
julia> first(pairs([10,20,30]))
1 => 10
julia> pairs([10,20,30])[1]
10
first treats it like an iterator but getindex treats it like a key-value map