enum.count â int
enum.count(item) â int
enum.count { |obj| block } â int
enum.count(item) â int
enum.count { |obj| block } â int
Instance Public methods
Returns the number of items in enum through enumeration. If an
argument is given, the number of items in enum that are equal
to item are counted. If a block is given, it counts the
number of elements yielding a true value.
ary = [1, 2, 4, 2]
ary.count #=> 4
ary.count(2) #=> 2
ary.count{ |x| x%2==0 } #=> 3
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