$<
is used with map
in the following code.
Is $<
enumerable?
$<.map{|l|p (0..9).to_a.repeated_permutation(4).count{|m|m.inject(&:+)==l.to_i}}
$<
is used with map
in the following code.
Is $<
enumerable?
$<.map{|l|p (0..9).to_a.repeated_permutation(4).count{|m|m.inject(&:+)==l.to_i}}
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Yes. It's an alias of
ARGF
which inherits directly fromObject
and includesEnumerable
.