>A few ‘why’ answered

>There are certain ‘why’ that we may have missed, so I am trying to attend them…one by one.

o Why do we need hash table?
Of course, for better, faster search. It could even get us an element in O(1).

But we need to use hash because if given data is in a form which can’t be ordered; we need hashing. Example can be images. How will you order a set of images and search any.
Hashing comes to help here. It generates a unique(ideally) hash key for given such data. We save these keys in a hash table. So searching an image is now searching a key in hash table. Keys are generated with a hash function. More about that later.

To be continued with more whys.

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s