NULL == X is just another coding style used by the programmers to avoid some mistakes in codes. 

Whenever people write bigger codes they use to follow these type of convention instead of X == NULL reason being while writing code the programmer may type X = NULL instead of X == NULL which will result in overwriting of X.
While in other case NULL ==X if accidently programmer writes NULL = X then he/she will get a compilation error instead overwriting. 

7 May 2017 - 3:29am

you have to generate features from the tweets.

eg: some hashtag says #serious so you can use this type of info in performing your sentiment analysis.

7 May 2017 - 2:55am

Thanks for the correction

13 Feb 2016 - 12:24am

456

12 Feb 2016 - 11:19pm

11

12 Feb 2016 - 11:16pm

B

12 Feb 2016 - 11:16pm

0.5

12 Feb 2016 - 11:15pm

15

12 Feb 2016 - 11:14pm

A

12 Feb 2016 - 11:14pm

#Edited

12 Feb 2016 - 11:09pm

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