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subhankar94/mcilroy.sh

Created November 24, 2016 22:29
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McIlroy's 6 line shell script to print k most frequently occurring words in a file
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mcilroy.sh
tr -cs A-Za-z '\n' | # transliterate non-alphabetic chars (-c) to newline ('\n'), squeeze identical adjacent to single instance (-s)
tr A-Z a-z | # transliterate upper case characters to lower case
sort | # sort alphabetically
uniq -c | # collapse identical adjacent lines and add occurence of each line (-c)
sort -rn | # sort in reverse (-r), based on numeric value (-n)
sed ${1}q # pass through stream editor, print first-arg-many words and then quit (q)
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