word_frequency.sh

'''
Write a bash script to calculate the frequency of each word in a text file words.txt.

For simplicity sake, you may assume:

words.txt contains only lowercase characters and space ' ' characters.
Each word must consist of lowercase characters only.
Words are separated by one or more whitespace characters.
Example:

Assume that words.txt has the following content:

the day is sunny the the
the sunny is is
Your script should output the following, sorted by descending frequency:

the 4
is 3
sunny 2
day 1
'''
cat words.txt | tr -s ' ' '\n' | sort | uniq -c | sort -r | awk '{ print $2, $1 }'

'''
explanation:
➜ Desktop cat Words.txt
the day is sunny the the
the sunny is is
➜ Desktop cat Words.txt| tr -s ' ' '\n'
the
day
is
sunny
the
the
the
sunny
is
is
➜ Desktop cat Words.txt| tr -s ' ' '\n' | sort
day
is
is
is
sunny
sunny
the
the
the
the
➜ Desktop cat Words.txt| tr -s ' ' '\n' | sort | uniq -c
1 day
3 is
2 sunny
4 the
➜ Desktop cat Words.txt| tr -s ' ' '\n' | sort | uniq -c | sort -r
4 the
3 is
2 sunny
1 day
➜ Desktop cat Words.txt| tr -s ' ' '\n' | sort | uniq -c | sort -r | awk '{print $2, $1}'
the 4
is 3
sunny 2
day 1

'''