Sha256: d9f1f96d1fcd20b136e32b57d8043db1649a053df07507413a50d7fd325c4bda
Contents?: true
Size: 954 Bytes
Versions: 7
Compression:
Stored size: 954 Bytes
Contents
class Array unless method_defined?(:rotate) # Rotates an array's elements from back to front n times. # # [1,2,3].rotate #=> [2,3,1] # [2,3,1].rotate #=> [3,1,2] # [3,1,2].rotate #=> [1,2,3] # # [1,2,3].rotate(3) #=> [1,2,3] # # A negative parameter reverses the order from front to back. # # [1,2,3].rotate(-1) #=> [3,1,2] # # CREDIT: Florian Gross, Thomas Sawyer def rotate(n=1) self.dup.rotate!(n) end end unless method_defined?(:rotate!) # Same as #rotate, but acts in place. # # a = [1,2,3] # a.rotate! # a #=> [2,3,1] # # CREDIT: Florian Gross, Thomas Sawyer def rotate!(n=1) n = n.to_int return self if (n == 0 or self.empty?) if n < 0 n.abs.times{ self.unshift( self.pop ) } else n.abs.times{ self.push( self.shift ) } end self end end end
Version data entries
7 entries across 6 versions & 1 rubygems