diff options
Diffstat (limited to 'lib/overwrite.rb')
-rw-r--r-- | lib/overwrite.rb | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/lib/overwrite.rb b/lib/overwrite.rb index 4a79051..d0422ee 100644 --- a/lib/overwrite.rb +++ b/lib/overwrite.rb @@ -101,13 +101,13 @@ class Array end def mean - self.inject{ |sum, el| sum + el }.to_f / self.size + self.compact.inject{ |sum, el| sum + el }.to_f / self.compact.size end def sample_variance m = self.mean - sum = self.inject(0){|accum, i| accum +(i-m)**2 } - sum/(self.length - 1).to_f + sum = self.compact.inject(0){|accum, i| accum +(i-m)**2 } + sum/(self.compact.length - 1).to_f end def standard_deviation @@ -123,6 +123,13 @@ class Array end end + def collect_with_index + result = [] + self.each_with_index do |elt, idx| + result << yield(elt, idx) + end + result + end end module URI |