Over a million developers have joined DZone.

Odd-Even Sort Visualized

· Web Dev Zone

Make the transition to Node.js if you are a Java, PHP, Rails or .NET developer with these resources to help jumpstart your Node.js knowledge plus pick up some development tips.  Brought to you in partnership with IBM.

The Odd/Even sort is a sorting algorithm which uses the concept of the Bubble Sort to move elements around. Unlike Bubble sort, the Odd/Even sort compares disjointed pairs by using alternating odd and even index values splitting the sorting in different phases. We have that in the odd phase all the element with an odd index i are compared with the adjacent even index i+1 and in the even phase all the element with an even index i are compared with the adjacent odd index i+1. These two phases are repeated until no exchanges are required. This is a Python snippet that make us able to visualize the behavior of the algorithm:
def oddeven_anim(a):
 imgidx =0
 x = range(len(a))
 sort =False;whilenot sort:
  sort =True;for i in range(1,len(a)-1,2):# odd phaseif a[i]> a[i+1]:
    a[i+1], a[i]= a[i], a[i+1]
    sort =False;for i in range(0,len(a)-1,2):# even phaseif a[i]> a[i+1]:
    a[i+1], a[i]= a[i], a[i+1]
    sort =False;
  pylab.savefig("oddevensort/img"+'%04d'% imgidx +".png")
  imgidx =  imgidx +1# run the algorithm
a = range(300)
As in the other examples of sorting visualization in this blog, we have an image for each step of the algorithm. The following video have been produced joining all the images (here is explained how):

Learn why developers are gravitating towards Node and its ability to retain and leverage the skills of JavaScript developers and the ability to deliver projects faster than other languages can.  Brought to you in partnership with IBM.


Published at DZone with permission of Giuseppe Vettigli, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

The best of DZone straight to your inbox.

Please provide a valid email address.

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}