Sha256: 1bf837019ec1a1dff440202ba9d0d74a7da6ad9966def2dda5d3af6b0f7d6071
Contents?: true
Size: 328 Bytes
Versions: 7
Compression:
Stored size: 328 Bytes
Contents
class Array
#
# Return the average of my elements.
#
# precondition: Each element must be convertible to a float.
#
def average
return nil if empty?
raise ArgumentError, "Couldn't convert all elements to float!" unless
all?{|e| e.methods.index :to_f}
return map(&:to_f).inject(:+) / size
end
end
Version data entries
7 entries across 7 versions & 1 rubygems