WDM 9: Query optimization using Document Frequency 1

[@lilprotakeit]

i cant be more thankful to you .. you are brilliant in explaining complex stuff

[@jtnkathuria]

Thanks .. Great work..Helped me through my semester. :D

[@yiyu9519]

clever, who created this method?

[@nasirmohamed3218]

Your tips are good but you very slow

[@muntasiranaanme4436]

YOU talk so slowly its pissing off

[@kannu5039]

Its very important that we understand everything. If he is fast then its gonna be hard for most of the people who dont have much background in IR

[@twomad1355]

well it shows ur lack of concentration and short attention span

[@monarch0243]

@@twomad1355 2x