Method: Array#count

Defined in:
lib/ruby/jruby_hack.rb

#count(*args) ⇒ Integer

Count the number of elements that satisfy the predicate

Examples:

["abc", "de", "fg", "hi"].count{|s| s.length == 2 } #=> 3
["a", "b", "a", "c", "a"].count("a")                #=> 3
[1, 3, 5, 9, 0].count                               #=> 5

Returns:



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# File 'lib/ruby/jruby_hack.rb', line 215

def count(*args)
  if block_given?
    inject(0){|n, e| yield(e) ? n + 1 : n }
  elsif args.empty?
    size
  else
    inject(0){|n, e| e == args.first ? n + 1 : n }
  end
end